[test] Migrate all uses of gtest to googletest

gtest is an old version that predates the googletest and googlemock
merger, all tests should be using the newer googletest that's being
kept in sync with the upstream version.

Change-Id: I17ad5df9f29203a6419eb5f7cbe9851fc87083c7
diff --git a/BUILD.gn b/BUILD.gn
index fbf8939..ee61655 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -11,7 +11,7 @@
     "main.cc",
   ]
   deps = [
-    "//third_party/gtest",
+    "//third_party/googletest:gtest",
     "//third_party/libc-tests/third_party/nacl-ported-tests/abi:small_tests",
     "//third_party/libc-tests/third_party/nacl-ported-tests/bigalloc:small_tests",
     "//third_party/libc-tests/third_party/nacl-ported-tests/dup:small_tests",
@@ -36,7 +36,7 @@
     "main.cc",
   ]
   deps = [
-    "//third_party/gtest",
+    "//third_party/googletest:gtest",
     "//third_party/libc-tests/third_party/nacl-ported-tests/fdopen_test:small_tests",
     "//third_party/libc-tests/third_party/nacl-ported-tests/file:small_tests",
     "//third_party/libc-tests/third_party/nacl-ported-tests/libc:small_tests_broken",
@@ -52,7 +52,7 @@
     "main.cc",
   ]
   deps = [
-    "//third_party/gtest",
+    "//third_party/googletest:gtest",
     "//third_party/libc-tests/third_party/nacl-ported-tests/libc:large_tests",
   ]
 }