[build] delete GN files

These are being transitioned to the protobuf-gn repo.

Note I need to leave protoc_wrapper.py for now, since there is one
reference to its location here which needs to be transitioned softly:
https://fuchsia.googlesource.com/fuchsia/+/ed003ff74ea8768fadcffd26b04266d445c1e9c3/tools/dart-strict-deps/BUILD.gn#69

Bug: 59636
Change-Id: Ib3caca5473dd1e53468f682e1ad2fa8afaeb4e72
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/protobuf/+/487902
Reviewed-by: Zach Bush <zmbush@google.com>
diff --git a/BUILD.gn b/BUILD.gn
deleted file mode 100644
index db3f81b..0000000
--- a/BUILD.gn
+++ /dev/null
@@ -1,522 +0,0 @@
-# Copyright 2017 The Fuchsia Authors. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#    * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#    * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#    * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-import("//build/compiled_action.gni")
-
-config("protobuf_config") {
-  include_dirs = [ "src" ]
-  defines = [
-    "GOOGLE_PROTOBUF_NO_RTTI",
-    "GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
-    "HAVE_PTHREAD",
-  ]
-}
-config("protobuf_warnings") {
-  cflags = []
-  if (is_clang) {
-    # protobuf-3 contains a few functions that are unused.
-    cflags += [ "-Wno-unused-function" ]
-
-    # Note(rudominer) I added these because there were a lot of warnings.
-    cflags += [
-      "-Wno-sign-compare",
-      "-Wno-missing-field-initializers",
-      "-Wno-enum-compare-switch",
-      "-Wno-conversion",
-    ]
-  }
-}
-
-executable("js_embed") {
-  sources = [ "src/google/protobuf/compiler/js/embed.cc" ]
-  configs += [ ":protobuf_warnings" ]
-}
-
-compiled_action("run_js_embed") {
-  tool = ":js_embed"
-
-  inputs = [
-    "src/google/protobuf/compiler/js/well_known_types/any.js",
-    "src/google/protobuf/compiler/js/well_known_types/struct.js",
-    "src/google/protobuf/compiler/js/well_known_types/timestamp.js",
-  ]
-
-  outputs = [
-    "$target_gen_dir/google/protobuf/compiler/js/well_known_types_embed.cc",
-  ]
-
-  args = [
-           "--output_file",
-           rebase_path(
-               "$target_gen_dir/google/protobuf/compiler/js/well_known_types_embed.cc",
-               root_build_dir),
-         ] + rebase_path(inputs, root_build_dir)
-}
-
-# This config should be applied to targets using generated code from the proto
-# compiler. It sets up the include directories properly.
-config("using_proto") {
-  include_dirs = [
-    "src",
-    "$root_gen_dir",
-  ]
-}
-
-protobuf_lite_sources = [
-  "src/google/protobuf/arena.cc",
-  "src/google/protobuf/arena.h",
-  "src/google/protobuf/arenastring.cc",
-  "src/google/protobuf/arenastring.h",
-  "src/google/protobuf/extension_set.cc",
-  "src/google/protobuf/extension_set.h",
-  "src/google/protobuf/generated_message_util.cc",
-  "src/google/protobuf/generated_message_util.h",
-  "src/google/protobuf/io/coded_stream.cc",
-  "src/google/protobuf/io/coded_stream.h",
-  "src/google/protobuf/io/coded_stream_inl.h",
-  "src/google/protobuf/io/zero_copy_stream.cc",
-  "src/google/protobuf/io/zero_copy_stream.h",
-  "src/google/protobuf/io/zero_copy_stream_impl_lite.cc",
-  "src/google/protobuf/io/zero_copy_stream_impl_lite.h",
-  "src/google/protobuf/map.h",
-  "src/google/protobuf/map_entry_lite.h",
-  "src/google/protobuf/map_field_lite.h",
-  "src/google/protobuf/map_type_handler.h",
-  "src/google/protobuf/message_lite.cc",
-  "src/google/protobuf/message_lite.h",
-  "src/google/protobuf/repeated_field.cc",
-  "src/google/protobuf/repeated_field.h",
-  "src/google/protobuf/stubs/atomic_sequence_num.h",
-  "src/google/protobuf/stubs/atomicops.h",
-  "src/google/protobuf/stubs/atomicops_internals_arm64_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_arm_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_arm_qnx.h",
-  "src/google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h",
-  "src/google/protobuf/stubs/atomicops_internals_generic_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_mips_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_power.h",
-  "src/google/protobuf/stubs/atomicops_internals_ppc_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_solaris.h",
-  "src/google/protobuf/stubs/atomicops_internals_tsan.h",
-  "src/google/protobuf/stubs/atomicops_internals_x86_gcc.cc",
-  "src/google/protobuf/stubs/atomicops_internals_x86_gcc.h",
-  "src/google/protobuf/stubs/atomicops_internals_x86_msvc.cc",
-  "src/google/protobuf/stubs/atomicops_internals_x86_msvc.h",
-  "src/google/protobuf/stubs/bytestream.cc",
-  "src/google/protobuf/stubs/bytestream.h",
-  "src/google/protobuf/stubs/callback.h",
-  "src/google/protobuf/stubs/casts.h",
-  "src/google/protobuf/stubs/common.cc",
-  "src/google/protobuf/stubs/common.h",
-  "src/google/protobuf/stubs/fastmem.h",
-  "src/google/protobuf/stubs/hash.h",
-  "src/google/protobuf/stubs/int128.cc",
-  "src/google/protobuf/stubs/int128.h",
-  "src/google/protobuf/stubs/logging.h",
-  "src/google/protobuf/stubs/macros.h",
-  "src/google/protobuf/stubs/map_util.h",
-  "src/google/protobuf/stubs/mutex.h",
-  "src/google/protobuf/stubs/once.cc",
-  "src/google/protobuf/stubs/once.h",
-  "src/google/protobuf/stubs/platform_macros.h",
-  "src/google/protobuf/stubs/port.h",
-  "src/google/protobuf/stubs/scoped_ptr.h",
-  "src/google/protobuf/stubs/shared_ptr.h",
-  "src/google/protobuf/stubs/status.cc",
-  "src/google/protobuf/stubs/status.h",
-  "src/google/protobuf/stubs/status_macros.h",
-  "src/google/protobuf/stubs/statusor.cc",
-  "src/google/protobuf/stubs/statusor.h",
-  "src/google/protobuf/stubs/stl_util.h",
-  "src/google/protobuf/stubs/stringpiece.cc",
-  "src/google/protobuf/stubs/stringpiece.h",
-  "src/google/protobuf/stubs/stringprintf.cc",
-  "src/google/protobuf/stubs/stringprintf.h",
-  "src/google/protobuf/stubs/structurally_valid.cc",
-  "src/google/protobuf/stubs/strutil.cc",
-  "src/google/protobuf/stubs/strutil.h",
-  "src/google/protobuf/stubs/template_util.h",
-  "src/google/protobuf/stubs/time.cc",
-  "src/google/protobuf/stubs/time.h",
-  "src/google/protobuf/stubs/type_traits.h",
-  "src/google/protobuf/wire_format_lite.cc",
-  "src/google/protobuf/wire_format_lite.h",
-  "src/google/protobuf/wire_format_lite_inl.h",
-]
-
-static_library("protobuf_lite") {
-  sources = protobuf_lite_sources
-  configs += [ ":protobuf_warnings" ]
-  public_configs = [ ":protobuf_config" ]
-  cflags = []
-}
-
-# This is the full, heavy protobuf lib that's needed for c++ .protos that don't
-# specify the LITE_RUNTIME option. The protocol compiler itself (protoc) falls
-# into that category.
-static_library("protobuf_full") {
-  sources = protobuf_lite_sources + [
-              "src/google/protobuf/any.cc",
-              "src/google/protobuf/any.h",
-              "src/google/protobuf/any.pb.cc",
-              "src/google/protobuf/any.pb.h",
-              "src/google/protobuf/api.pb.cc",
-              "src/google/protobuf/api.pb.h",
-              "src/google/protobuf/compiler/importer.cc",
-              "src/google/protobuf/compiler/importer.h",
-              "src/google/protobuf/compiler/parser.cc",
-              "src/google/protobuf/compiler/parser.h",
-              "src/google/protobuf/descriptor.cc",
-              "src/google/protobuf/descriptor.h",
-              "src/google/protobuf/descriptor.pb.cc",
-              "src/google/protobuf/descriptor.pb.h",
-              "src/google/protobuf/descriptor_database.cc",
-              "src/google/protobuf/descriptor_database.h",
-              "src/google/protobuf/duration.pb.cc",
-              "src/google/protobuf/duration.pb.h",
-              "src/google/protobuf/dynamic_message.cc",
-              "src/google/protobuf/dynamic_message.h",
-              "src/google/protobuf/empty.pb.cc",
-              "src/google/protobuf/empty.pb.h",
-              "src/google/protobuf/extension_set_heavy.cc",
-              "src/google/protobuf/field_mask.pb.cc",
-              "src/google/protobuf/field_mask.pb.h",
-              "src/google/protobuf/generated_enum_reflection.h",
-              "src/google/protobuf/generated_enum_util.h",
-              "src/google/protobuf/generated_message_reflection.cc",
-              "src/google/protobuf/generated_message_reflection.h",
-
-              # gzip_stream.cc pulls in zlib, but it's not actually used by protoc, just
-              # by test code, so instead of compiling zlib for the host, let's just
-              # exclude this.
-              # "src/google/protobuf/io/gzip_stream.cc",
-              # "src/google/protobuf/io/gzip_stream.h",
-              "src/google/protobuf/io/printer.cc",
-              "src/google/protobuf/io/printer.h",
-              "src/google/protobuf/io/strtod.cc",
-              "src/google/protobuf/io/strtod.h",
-              "src/google/protobuf/io/tokenizer.cc",
-              "src/google/protobuf/io/tokenizer.h",
-              "src/google/protobuf/io/zero_copy_stream_impl.cc",
-              "src/google/protobuf/io/zero_copy_stream_impl.h",
-              "src/google/protobuf/map_entry.h",
-              "src/google/protobuf/map_field.cc",
-              "src/google/protobuf/map_field.h",
-              "src/google/protobuf/map_field_inl.h",
-              "src/google/protobuf/message.cc",
-              "src/google/protobuf/message.h",
-              "src/google/protobuf/metadata.h",
-              "src/google/protobuf/reflection.h",
-              "src/google/protobuf/reflection_internal.h",
-              "src/google/protobuf/reflection_ops.cc",
-              "src/google/protobuf/reflection_ops.h",
-              "src/google/protobuf/service.cc",
-              "src/google/protobuf/service.h",
-              "src/google/protobuf/source_context.pb.cc",
-              "src/google/protobuf/source_context.pb.h",
-              "src/google/protobuf/struct.pb.cc",
-              "src/google/protobuf/struct.pb.h",
-              "src/google/protobuf/stubs/mathlimits.cc",
-              "src/google/protobuf/stubs/mathlimits.h",
-              "src/google/protobuf/stubs/mathutil.h",
-              "src/google/protobuf/stubs/singleton.h",
-              "src/google/protobuf/stubs/substitute.cc",
-              "src/google/protobuf/stubs/substitute.h",
-              "src/google/protobuf/text_format.cc",
-              "src/google/protobuf/text_format.h",
-              "src/google/protobuf/timestamp.pb.cc",
-              "src/google/protobuf/timestamp.pb.h",
-              "src/google/protobuf/type.pb.cc",
-              "src/google/protobuf/type.pb.h",
-              "src/google/protobuf/unknown_field_set.cc",
-              "src/google/protobuf/unknown_field_set.h",
-              "src/google/protobuf/util/field_comparator.cc",
-              "src/google/protobuf/util/field_comparator.h",
-              "src/google/protobuf/util/field_mask_util.cc",
-              "src/google/protobuf/util/field_mask_util.h",
-              "src/google/protobuf/util/internal/constants.h",
-              "src/google/protobuf/util/internal/datapiece.cc",
-              "src/google/protobuf/util/internal/datapiece.h",
-              "src/google/protobuf/util/internal/default_value_objectwriter.cc",
-              "src/google/protobuf/util/internal/default_value_objectwriter.h",
-              "src/google/protobuf/util/internal/error_listener.cc",
-              "src/google/protobuf/util/internal/error_listener.h",
-              "src/google/protobuf/util/internal/field_mask_utility.cc",
-              "src/google/protobuf/util/internal/field_mask_utility.h",
-              "src/google/protobuf/util/internal/json_escaping.cc",
-              "src/google/protobuf/util/internal/json_escaping.h",
-              "src/google/protobuf/util/internal/json_objectwriter.cc",
-              "src/google/protobuf/util/internal/json_objectwriter.h",
-              "src/google/protobuf/util/internal/json_stream_parser.cc",
-              "src/google/protobuf/util/internal/json_stream_parser.h",
-              "src/google/protobuf/util/internal/location_tracker.h",
-              "src/google/protobuf/util/internal/object_location_tracker.h",
-              "src/google/protobuf/util/internal/object_source.h",
-              "src/google/protobuf/util/internal/object_writer.cc",
-              "src/google/protobuf/util/internal/object_writer.h",
-              "src/google/protobuf/util/internal/proto_writer.cc",
-              "src/google/protobuf/util/internal/proto_writer.h",
-              "src/google/protobuf/util/internal/protostream_objectsource.cc",
-              "src/google/protobuf/util/internal/protostream_objectsource.h",
-              "src/google/protobuf/util/internal/protostream_objectwriter.cc",
-              "src/google/protobuf/util/internal/protostream_objectwriter.h",
-              "src/google/protobuf/util/internal/structured_objectwriter.h",
-              "src/google/protobuf/util/internal/type_info.cc",
-              "src/google/protobuf/util/internal/type_info.h",
-              "src/google/protobuf/util/internal/type_info_test_helper.cc",
-              "src/google/protobuf/util/internal/type_info_test_helper.h",
-              "src/google/protobuf/util/internal/utility.cc",
-              "src/google/protobuf/util/internal/utility.h",
-              "src/google/protobuf/util/json_util.cc",
-              "src/google/protobuf/util/json_util.h",
-              "src/google/protobuf/util/message_differencer.cc",
-              "src/google/protobuf/util/message_differencer.h",
-              "src/google/protobuf/util/time_util.cc",
-              "src/google/protobuf/util/time_util.h",
-              "src/google/protobuf/util/type_resolver.h",
-              "src/google/protobuf/util/type_resolver_util.cc",
-              "src/google/protobuf/util/type_resolver_util.h",
-              "src/google/protobuf/wire_format.cc",
-              "src/google/protobuf/wire_format.h",
-              "src/google/protobuf/wrappers.pb.cc",
-              "src/google/protobuf/wrappers.pb.h",
-            ]
-  configs += [ ":protobuf_warnings" ]
-  public_configs = [ ":protobuf_config" ]
-  cflags = []
-}
-
-# Only compile the compiler for the host architecture.
-if (current_toolchain == host_toolchain) {
-  # protoc compiler is separated into protoc library and executable targets to
-  # support protoc plugins that need to link libprotoc, but not the main()
-  # itself. See src/google/protobuf/compiler/plugin.h
-  static_library("protoc_lib") {
-    sources = [
-      "$target_gen_dir/google/protobuf/compiler/js/well_known_types_embed.cc",
-      "src//google/protobuf/compiler/js/well_known_types_embed.h",
-      "src/google/protobuf/compiler/code_generator.cc",
-      "src/google/protobuf/compiler/code_generator.h",
-      "src/google/protobuf/compiler/command_line_interface.cc",
-      "src/google/protobuf/compiler/command_line_interface.h",
-      "src/google/protobuf/compiler/cpp/cpp_enum.cc",
-      "src/google/protobuf/compiler/cpp/cpp_enum.h",
-      "src/google/protobuf/compiler/cpp/cpp_enum_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_enum_field.h",
-      "src/google/protobuf/compiler/cpp/cpp_extension.cc",
-      "src/google/protobuf/compiler/cpp/cpp_extension.h",
-      "src/google/protobuf/compiler/cpp/cpp_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_field.h",
-      "src/google/protobuf/compiler/cpp/cpp_file.cc",
-      "src/google/protobuf/compiler/cpp/cpp_file.h",
-      "src/google/protobuf/compiler/cpp/cpp_generator.cc",
-      "src/google/protobuf/compiler/cpp/cpp_generator.h",
-      "src/google/protobuf/compiler/cpp/cpp_helpers.cc",
-      "src/google/protobuf/compiler/cpp/cpp_helpers.h",
-      "src/google/protobuf/compiler/cpp/cpp_map_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_map_field.h",
-      "src/google/protobuf/compiler/cpp/cpp_message.cc",
-      "src/google/protobuf/compiler/cpp/cpp_message.h",
-      "src/google/protobuf/compiler/cpp/cpp_message_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_message_field.h",
-      "src/google/protobuf/compiler/cpp/cpp_padding_optimizer.cc",
-      "src/google/protobuf/compiler/cpp/cpp_padding_optimizer.h",
-      "src/google/protobuf/compiler/cpp/cpp_primitive_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_primitive_field.h",
-      "src/google/protobuf/compiler/cpp/cpp_service.cc",
-      "src/google/protobuf/compiler/cpp/cpp_service.h",
-      "src/google/protobuf/compiler/cpp/cpp_string_field.cc",
-      "src/google/protobuf/compiler/cpp/cpp_string_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_doc_comment.cc",
-      "src/google/protobuf/compiler/csharp/csharp_doc_comment.h",
-      "src/google/protobuf/compiler/csharp/csharp_enum.cc",
-      "src/google/protobuf/compiler/csharp/csharp_enum.h",
-      "src/google/protobuf/compiler/csharp/csharp_enum_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_enum_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_field_base.cc",
-      "src/google/protobuf/compiler/csharp/csharp_field_base.h",
-      "src/google/protobuf/compiler/csharp/csharp_generator.cc",
-      "src/google/protobuf/compiler/csharp/csharp_generator.h",
-      "src/google/protobuf/compiler/csharp/csharp_helpers.cc",
-      "src/google/protobuf/compiler/csharp/csharp_helpers.h",
-      "src/google/protobuf/compiler/csharp/csharp_map_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_map_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_message.cc",
-      "src/google/protobuf/compiler/csharp/csharp_message.h",
-      "src/google/protobuf/compiler/csharp/csharp_message_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_message_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_options.h",
-      "src/google/protobuf/compiler/csharp/csharp_primitive_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_primitive_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_reflection_class.cc",
-      "src/google/protobuf/compiler/csharp/csharp_reflection_class.h",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_enum_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_enum_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_message_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_message_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_primitive_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_repeated_primitive_field.h",
-      "src/google/protobuf/compiler/csharp/csharp_source_generator_base.cc",
-      "src/google/protobuf/compiler/csharp/csharp_source_generator_base.h",
-      "src/google/protobuf/compiler/csharp/csharp_wrapper_field.cc",
-      "src/google/protobuf/compiler/csharp/csharp_wrapper_field.h",
-      "src/google/protobuf/compiler/java/java_context.cc",
-      "src/google/protobuf/compiler/java/java_context.h",
-      "src/google/protobuf/compiler/java/java_doc_comment.cc",
-      "src/google/protobuf/compiler/java/java_doc_comment.h",
-      "src/google/protobuf/compiler/java/java_enum.cc",
-      "src/google/protobuf/compiler/java/java_enum.h",
-      "src/google/protobuf/compiler/java/java_enum_field.cc",
-      "src/google/protobuf/compiler/java/java_enum_field.h",
-      "src/google/protobuf/compiler/java/java_enum_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_enum_field_lite.h",
-      "src/google/protobuf/compiler/java/java_enum_lite.cc",
-      "src/google/protobuf/compiler/java/java_enum_lite.h",
-      "src/google/protobuf/compiler/java/java_extension.cc",
-      "src/google/protobuf/compiler/java/java_extension.h",
-      "src/google/protobuf/compiler/java/java_extension_lite.cc",
-      "src/google/protobuf/compiler/java/java_extension_lite.h",
-      "src/google/protobuf/compiler/java/java_field.cc",
-      "src/google/protobuf/compiler/java/java_field.h",
-      "src/google/protobuf/compiler/java/java_file.cc",
-      "src/google/protobuf/compiler/java/java_file.h",
-      "src/google/protobuf/compiler/java/java_generator.cc",
-      "src/google/protobuf/compiler/java/java_generator.h",
-      "src/google/protobuf/compiler/java/java_generator_factory.cc",
-      "src/google/protobuf/compiler/java/java_generator_factory.h",
-      "src/google/protobuf/compiler/java/java_helpers.cc",
-      "src/google/protobuf/compiler/java/java_helpers.h",
-      "src/google/protobuf/compiler/java/java_lazy_message_field.cc",
-      "src/google/protobuf/compiler/java/java_lazy_message_field.h",
-      "src/google/protobuf/compiler/java/java_lazy_message_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_lazy_message_field_lite.h",
-      "src/google/protobuf/compiler/java/java_map_field.cc",
-      "src/google/protobuf/compiler/java/java_map_field.h",
-      "src/google/protobuf/compiler/java/java_map_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_map_field_lite.h",
-      "src/google/protobuf/compiler/java/java_message.cc",
-      "src/google/protobuf/compiler/java/java_message.h",
-      "src/google/protobuf/compiler/java/java_message_builder.cc",
-      "src/google/protobuf/compiler/java/java_message_builder.h",
-      "src/google/protobuf/compiler/java/java_message_builder_lite.cc",
-      "src/google/protobuf/compiler/java/java_message_builder_lite.h",
-      "src/google/protobuf/compiler/java/java_message_field.cc",
-      "src/google/protobuf/compiler/java/java_message_field.h",
-      "src/google/protobuf/compiler/java/java_message_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_message_field_lite.h",
-      "src/google/protobuf/compiler/java/java_message_lite.cc",
-      "src/google/protobuf/compiler/java/java_message_lite.h",
-      "src/google/protobuf/compiler/java/java_name_resolver.cc",
-      "src/google/protobuf/compiler/java/java_name_resolver.h",
-      "src/google/protobuf/compiler/java/java_primitive_field.cc",
-      "src/google/protobuf/compiler/java/java_primitive_field.h",
-      "src/google/protobuf/compiler/java/java_primitive_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_primitive_field_lite.h",
-      "src/google/protobuf/compiler/java/java_service.cc",
-      "src/google/protobuf/compiler/java/java_service.h",
-      "src/google/protobuf/compiler/java/java_shared_code_generator.cc",
-      "src/google/protobuf/compiler/java/java_shared_code_generator.h",
-      "src/google/protobuf/compiler/java/java_string_field.cc",
-      "src/google/protobuf/compiler/java/java_string_field.h",
-      "src/google/protobuf/compiler/java/java_string_field_lite.cc",
-      "src/google/protobuf/compiler/java/java_string_field_lite.h",
-      "src/google/protobuf/compiler/javanano/javanano_enum.cc",
-      "src/google/protobuf/compiler/javanano/javanano_enum.h",
-      "src/google/protobuf/compiler/javanano/javanano_enum_field.cc",
-      "src/google/protobuf/compiler/javanano/javanano_enum_field.h",
-      "src/google/protobuf/compiler/javanano/javanano_extension.cc",
-      "src/google/protobuf/compiler/javanano/javanano_extension.h",
-      "src/google/protobuf/compiler/javanano/javanano_field.cc",
-      "src/google/protobuf/compiler/javanano/javanano_field.h",
-      "src/google/protobuf/compiler/javanano/javanano_file.cc",
-      "src/google/protobuf/compiler/javanano/javanano_file.h",
-      "src/google/protobuf/compiler/javanano/javanano_generator.cc",
-      "src/google/protobuf/compiler/javanano/javanano_generator.h",
-      "src/google/protobuf/compiler/javanano/javanano_helpers.cc",
-      "src/google/protobuf/compiler/javanano/javanano_helpers.h",
-      "src/google/protobuf/compiler/javanano/javanano_map_field.cc",
-      "src/google/protobuf/compiler/javanano/javanano_map_field.h",
-      "src/google/protobuf/compiler/javanano/javanano_message.cc",
-      "src/google/protobuf/compiler/javanano/javanano_message.h",
-      "src/google/protobuf/compiler/javanano/javanano_message_field.cc",
-      "src/google/protobuf/compiler/javanano/javanano_message_field.h",
-      "src/google/protobuf/compiler/javanano/javanano_primitive_field.cc",
-      "src/google/protobuf/compiler/javanano/javanano_primitive_field.h",
-      "src/google/protobuf/compiler/js/js_generator.cc",
-      "src/google/protobuf/compiler/js/js_generator.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_enum.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_enum.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_enum_field.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_enum_field.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_extension.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_extension.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_field.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_field.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_file.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_file.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_generator.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_generator.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_helpers.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_helpers.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_map_field.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_map_field.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_message.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_message.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_message_field.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_message_field.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_oneof.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_oneof.h",
-      "src/google/protobuf/compiler/objectivec/objectivec_primitive_field.cc",
-      "src/google/protobuf/compiler/objectivec/objectivec_primitive_field.h",
-      "src/google/protobuf/compiler/php/php_generator.cc",
-      "src/google/protobuf/compiler/php/php_generator.h",
-      "src/google/protobuf/compiler/plugin.cc",
-      "src/google/protobuf/compiler/plugin.h",
-      "src/google/protobuf/compiler/plugin.pb.cc",
-      "src/google/protobuf/compiler/plugin.pb.h",
-      "src/google/protobuf/compiler/python/python_generator.cc",
-      "src/google/protobuf/compiler/python/python_generator.h",
-      "src/google/protobuf/compiler/ruby/ruby_generator.cc",
-      "src/google/protobuf/compiler/ruby/ruby_generator.h",
-      "src/google/protobuf/compiler/subprocess.cc",
-      "src/google/protobuf/compiler/subprocess.h",
-      "src/google/protobuf/compiler/zip_writer.cc",
-      "src/google/protobuf/compiler/zip_writer.h",
-    ]
-    configs += [ ":protobuf_warnings" ]
-    public_deps = [
-      ":protobuf_full",
-      ":run_js_embed",
-    ]
-  }
-
-  executable("protoc") {
-    sources = [ "src/google/protobuf/compiler/main.cc" ]
-    deps = [ ":protoc_lib" ]
-  }
-}
diff --git a/proto_library.gni b/proto_library.gni
deleted file mode 100644
index f1f15bf..0000000
--- a/proto_library.gni
+++ /dev/null
@@ -1,425 +0,0 @@
-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Compile a protocol buffer.
-#
-# Protobuf parameters:
-#
-#   proto_in_dir (optional)
-#       Specifies the path relative to the current BUILD.gn file where
-#       proto files are located and the directory structure of
-#       this proto library starts.
-#
-#       This option can be calculated automatically but it will raise an
-#       assertion error if any nested directories are found.
-#
-#   proto_out_dir (optional)
-#       Specifies the path suffix that output files are generated under.
-#       This path will be appended to |root_gen_dir|, but for python stubs
-#       it will be appended to |root_build_dir|/pyproto.
-#
-#   generate_python (optional, default true)
-#       Generate Python protobuf stubs.
-#
-#   generate_cc (optional, default true)
-#       Generate C++ protobuf stubs.
-#
-#   generate_descriptor_set (optional, default false)
-#       Generate a descriptor set file.
-#
-#   generate_go (optional, default false)
-#       Generate Go protobuf stubs.
-#
-#   cc_generator_options (optional)
-#       List of extra flags passed to the protocol compiler.  If you need to
-#       add an EXPORT macro to a protobuf's C++ header, set the
-#       'cc_generator_options' variable with the value:
-#       'dllexport_decl=FOO_EXPORT:' (note trailing colon).
-#
-#       It is likely you also need to #include a file for the above EXPORT
-#       macro to work (see cc_include) and set
-#       component_build_force_source_set = true.
-#
-#   cc_include (optional)
-#       String listing an extra include that should be passed.
-#       Example: cc_include = "foo/bar.h"
-#
-#   generator_plugin_label (optional)
-#       GN label for plugin executable which generates custom cc stubs.
-#       Don't specify a toolchain, host toolchain is assumed.
-#
-#   generator_plugin_script (optional)
-#       Path to plugin script. Mutually exclusive with |generator_plugin_label|.
-#
-#   generator_plugin_script_deps (optional)
-#       List of additional files required for generator plugin script.
-#
-#   generator_plugin_suffix[es] (required if using a plugin)
-#       Suffix (before extension) for generated .cc and .h files
-#       or list of suffixes for all files (with extensions).
-#
-#   generator_plugin_options (optional)
-#       Extra flags passed to the plugin. See cc_generator_options.
-#
-#   deps (optional)
-#       Additional dependencies.
-#
-#   use_protobuf_full (optional, default false)
-#       If adding protobuf library would be required, adds protobuf_full to deps
-#       instead of protobuf_lite.
-#
-#   import_protobuf_full (optional, default false)
-#       Allows .proto files to import .proto files from protobuf_full, without
-#       adding a dependency on all the C++ code in that library.
-#
-#   import_dirs (optional)
-#       A list of extra import directories to be passed to protoc compiler. The
-#       default case is just proto_in_dir.
-#       WARNING: This options should not be used in Chrome code until
-#       http://crbug.com/691451 is resolved.
-#
-# Parameters for compiling the generated code:
-#
-#   defines (optional)
-#       Defines to supply to the source set that compiles the generated source
-#       code.
-#
-#   extra_configs (optional)
-#       A list of config labels that will be appended to the configs applying
-#       to the source set.
-#
-# Example:
-#  proto_library("mylib") {
-#    sources = [
-#      "foo.proto",
-#    ]
-#  }
-
-template("proto_library") {
-  assert(defined(invoker.sources), "Need sources for proto_library")
-  proto_sources = invoker.sources
-
-  forward_variables_from(invoker, [ "visibility" ])
-
-  # Don't apply OS-specific sources filtering to the assignments later on.
-  # Platform files should have gotten filtered out in the sources assignment
-  # when this template was invoked. If they weren't, it was on purpose and
-  # this template shouldn't re-apply the filter.
-  set_sources_assignment_filter([])
-
-  if (defined(invoker.generate_cc)) {
-    generate_cc = invoker.generate_cc
-  } else {
-    generate_cc = true
-  }
-
-  if (defined(invoker.generate_python)) {
-    generate_python = invoker.generate_python
-  } else {
-    generate_python = true
-  }
-
-  if (defined(invoker.generate_descriptor_set)) {
-    generate_descriptor_set = invoker.generate_descriptor_set
-  } else {
-    generate_descriptor_set = false
-  }
-
-  if (defined(invoker.generate_go)) {
-    generate_go = invoker.generate_go
-  } else {
-    generate_go = false
-  }
-
-  if (defined(invoker.generator_plugin_label)) {
-    # Straightforward way to get the name of executable doesn't work because
-    # |root_out_dir| and |root_build_dir| may differ in cross-compilation and
-    # also Windows executables have .exe at the end.
-
-    plugin_host_label = invoker.generator_plugin_label + "($host_toolchain)"
-    plugin_path = get_label_info(plugin_host_label, "root_out_dir") + "/" +
-                  get_label_info(plugin_host_label, "name")
-    generate_with_plugin = true
-  } else if (defined(invoker.generator_plugin_script)) {
-    plugin_path = invoker.generator_plugin_script
-    generate_with_plugin = true
-  } else {
-    generate_with_plugin = false
-  }
-
-  if (generate_with_plugin) {
-    if (defined(invoker.generator_plugin_suffix)) {
-      generator_plugin_suffixes = [
-        "${invoker.generator_plugin_suffix}.h",
-        "${invoker.generator_plugin_suffix}.cc",
-      ]
-    } else {
-      generator_plugin_suffixes = invoker.generator_plugin_suffixes
-    }
-  }
-
-  if (defined(invoker.proto_in_dir)) {
-    proto_in_dir = invoker.proto_in_dir
-  } else {
-    proto_in_dir = get_path_info(proto_sources[0], "dir")
-
-    # Sanity check, |proto_in_dir| should be defined to allow sub-directories.
-    foreach(proto_source, proto_sources) {
-      assert(get_path_info(proto_source, "dir") == proto_in_dir,
-             "Please define |proto_in_dir| to allow nested directories.")
-    }
-  }
-
-  # Avoid absolute path because of the assumption that |proto_in_dir| is
-  # relative to the directory of current BUILD.gn file.
-  proto_in_dir = rebase_path(proto_in_dir, ".")
-
-  if (defined(invoker.proto_out_dir)) {
-    proto_out_dir = invoker.proto_out_dir
-  } else {
-    # Absolute path to the directory of current BUILD.gn file excluding "//".
-    proto_out_dir = rebase_path(".", "//")
-    if (proto_in_dir != ".") {
-      proto_out_dir += "/$proto_in_dir"
-    }
-  }
-
-  # We need both absolute path to use in GN statements and a relative one
-  # to pass to external script.
-  if (generate_cc || generate_with_plugin) {
-    cc_out_dir = "$root_gen_dir/" + proto_out_dir
-    rel_cc_out_dir = rebase_path(cc_out_dir, root_build_dir)
-  }
-  if (generate_python) {
-    py_out_dir = "$root_out_dir/pyproto/" + proto_out_dir
-    rel_py_out_dir = rebase_path(py_out_dir, root_build_dir)
-  }
-  if (generate_go) {
-    go_out_dir = "$root_gen_dir/go-proto-gen/src/" + proto_out_dir
-    rel_go_out_dir = rebase_path(go_out_dir, root_build_dir)
-  }
-
-  protos = rebase_path(invoker.sources, proto_in_dir)
-  protogens = []
-  if (generate_descriptor_set) {
-    descriptor_set_out_out = "${target_out_dir}/${target_name}.desc.pb"
-    rel_descriptor_set_out_out =
-        rebase_path(descriptor_set_out_out, root_build_dir)
-    protogens += [ descriptor_set_out_out ]
-  }
-
-  # List output files.
-  foreach(proto, protos) {
-    proto_dir = get_path_info(proto, "dir")
-    proto_name = get_path_info(proto, "name")
-    proto_path = proto_dir + "/" + proto_name
-
-    if (generate_cc) {
-      protogens += [
-        "$cc_out_dir/$proto_path.pb.h",
-        "$cc_out_dir/$proto_path.pb.cc",
-      ]
-    }
-    if (generate_python) {
-      protogens += [ "$py_out_dir/${proto_path}_pb2.py" ]
-    }
-    if (generate_go) {
-      protogens += [ "$go_out_dir/${proto_path}.pb.go" ]
-    }
-    if (generate_with_plugin) {
-      foreach(suffix, generator_plugin_suffixes) {
-        protogens += [ "$cc_out_dir/${proto_path}${suffix}" ]
-      }
-    }
-  }
-
-  action_name = "${target_name}_gen"
-
-  # Generate protobuf stubs.
-  action(action_name) {
-    visibility = []
-    visibility = [ ":*" ]
-    hermetic_deps = false
-    script = "//third_party/protobuf/protoc_wrapper.py"
-    sources = proto_sources
-    outputs = get_path_info(protogens, "abspath")
-    args = protos
-
-    protoc_label = "//third_party/protobuf:protoc($host_toolchain)"
-    protoc_path = get_label_info(protoc_label, "root_out_dir") + "/protoc"
-
-    if (generate_go) {
-      protoc_gen_go_label = "//third_party/golibs/github.com/golang/protobuf/protoc-gen-go($host_toolchain)"
-      protoc_gen_go_path =
-          get_label_info(protoc_gen_go_label, "root_out_dir") + "/protoc-gen-go"
-    }
-
-    args += [
-      # Wrapper should never pick a system protoc.
-      # Path should be rebased because |root_build_dir| for current toolchain
-      # may be different from |root_out_dir| of protoc built on host toolchain.
-      "--protoc",
-      "./" + rebase_path(protoc_path, root_build_dir),
-      "--proto-in-dir",
-      rebase_path(proto_in_dir, root_build_dir),
-    ]
-
-    if (generate_cc) {
-      args += [
-        "--cc-out-dir",
-        rel_cc_out_dir,
-      ]
-      if (defined(invoker.cc_generator_options)) {
-        args += [
-          "--cc-options",
-          invoker.cc_generator_options,
-        ]
-      }
-      if (defined(invoker.cc_include)) {
-        args += [
-          "--include",
-          invoker.cc_include,
-        ]
-      }
-    }
-
-    if (generate_python) {
-      args += [
-        "--py-out-dir",
-        rel_py_out_dir,
-      ]
-    }
-
-    if (generate_descriptor_set) {
-      args += [
-        "--descriptor-set-out",
-        rel_descriptor_set_out_out,
-      ]
-    }
-
-    if (generate_go) {
-      args += [
-        "--plugin",
-        rebase_path(protoc_gen_go_path, root_build_dir),
-        "--plugin-out-dir",
-        rel_go_out_dir,
-        "--plugin-options",
-        "paths=source_relative",
-      ]
-    }
-
-    if (generate_with_plugin) {
-      args += [
-        "--plugin",
-        rebase_path(plugin_path, root_build_dir),
-        "--plugin-out-dir",
-        rel_cc_out_dir,
-      ]
-      if (defined(invoker.generator_plugin_options)) {
-        args += [
-          "--plugin-options",
-          invoker.generator_plugin_options,
-        ]
-      }
-    }
-
-    if (defined(invoker.import_dirs)) {
-      foreach(path, invoker.import_dirs) {
-        args += [ "--import-dir=" + rebase_path(path, root_build_dir) ]
-      }
-    }
-
-    if ((defined(invoker.use_protobuf_full) && invoker.use_protobuf_full) ||
-        (defined(invoker.import_protobuf_full) &&
-         invoker.import_protobuf_full)) {
-      args += [ "--import-dir=" +
-                rebase_path("//third_party/protobuf/src", root_build_dir) ]
-    }
-
-    # System protoc is not used so it's necessary to build one.
-    inputs = [ protoc_path ]
-    deps = [ protoc_label ]
-
-    if (generate_go) {
-      deps += [ protoc_gen_go_label ]
-      inputs += [ protoc_gen_go_path ]
-    }
-
-    if (generate_with_plugin) {
-      inputs += [ plugin_path ]
-      if (defined(invoker.generator_plugin_script_deps)) {
-        # Additional scripts for plugin.
-        inputs += invoker.generator_plugin_script_deps
-      }
-      if (defined(plugin_host_label)) {
-        # Action depends on native generator plugin but for host toolchain only.
-        deps += [ plugin_host_label ]
-      }
-    }
-
-    if (defined(invoker.deps)) {
-      # The deps may have steps that have to run before running protoc.
-      deps += invoker.deps
-    }
-  }
-
-  # Option to disable building a library in component build.
-  if (defined(invoker.component_build_force_source_set) &&
-      invoker.component_build_force_source_set && is_component_build) {
-    link_target_type = "source_set"
-  }
-
-  # Build generated protobuf stubs as static libary.
-  _static_lib_deps = []
-  if (generate_cc || generate_python || generate_with_plugin) {
-    _static_lib_name = "${target_name}_static_lib"
-    _static_lib_deps = [ ":${_static_lib_name}" ]
-    static_library(_static_lib_name) {
-      forward_variables_from(invoker,
-                             [
-                               "defines",
-                               "deps",
-                               "testonly",
-                             ])
-      visibility = []
-      visibility = [ ":*" ]
-      output_name = target_name
-      sources = []
-      foreach(source, get_target_outputs(":${action_name}")) {
-        extension = get_path_info(source, "extension")
-        if (extension == "h" || extension == "cc") {
-          sources += [ source ]
-        }
-      }
-
-      if (defined(invoker.extra_configs)) {
-        configs += invoker.extra_configs
-      }
-
-      configs += [ "//third_party/protobuf:protobuf_warnings" ]
-      public_configs = [ "//third_party/protobuf:using_proto" ]
-
-      if (!defined(deps)) {
-        deps = []
-      }
-      deps += [ ":${action_name}" ]
-
-      # If using built-in cc generator, the resulting headers reference headers
-      # within protobuf_lite. Hence, dependencies require those headers too.
-      # If using generator plugin, extra deps should be resolved by the invoker.
-      if (generate_cc) {
-        if (defined(invoker.use_protobuf_full) &&
-            invoker.use_protobuf_full == true) {
-          public_deps = [ "//third_party/protobuf:protobuf_full" ]
-        } else {
-          public_deps = [ "//third_party/protobuf:protobuf_lite" ]
-        }
-      }
-    }
-  }
-
-  group(target_name) {
-    public_deps = [ ":${action_name}" ] + _static_lib_deps
-  }
-}
diff --git a/test/BUILD.gn b/test/BUILD.gn
deleted file mode 100644
index 85fc19d..0000000
--- a/test/BUILD.gn
+++ /dev/null
@@ -1,32 +0,0 @@
-import("//build/test.gni")
-import("//build/test/test_package.gni")
-import("//third_party/protobuf/proto_library.gni")
-
-proto_library("custom_options_proto") {
-  sources = [
-    "custom_options.proto",
-  ]
-  use_protobuf_full = true
-}
-
-test("custom_options_test") {
-  sources = [
-    "custom_options.cc",
-  ]
-  deps = [
-    ":custom_options_proto",
-    "//third_party/googletest:gtest_main",
-  ]
-}
-
-test_package("protobuf_tests") {
-  deps = [
-    ":custom_options_test",
-  ]
-  tests = [
-    {
-      name = "custom_options_test"
-      environments = basic_envs
-    },
-  ]
-}