[dart] Pass --no_use_field_guards consistently

Change-Id: I18c7080f33ce85ed46d021f1a4800bbb39ff2b6a
diff --git a/runtime/dart_runner/dart_runner.cc b/runtime/dart_runner/dart_runner.cc
index 89feb9e..a546c14 100644
--- a/runtime/dart_runner/dart_runner.cc
+++ b/runtime/dart_runner/dart_runner.cc
@@ -47,6 +47,9 @@
     // The interpreter is enabled unconditionally. If an app is built for
     // debugging (that is, with no bytecode), the VM will fall back on ASTs.
     "--enable_interpreter",
+
+    // TODO(FL-208): Remove when field guards work.
+    "--no_use_field_guards",
 #endif
 
 #if !defined(NDEBUG) && !defined(DART_PRODUCT)
diff --git a/runtime/dart_runner/kernel/BUILD.gn b/runtime/dart_runner/kernel/BUILD.gn
index f1eddb5..87a0ce6 100644
--- a/runtime/dart_runner/kernel/BUILD.gn
+++ b/runtime/dart_runner/kernel/BUILD.gn
@@ -63,8 +63,9 @@
     }
 
     args = [
-      # TODO(zra): remove this when the interpreter supports field guards.
+      # TODO(FL-208): remove this when the interpreter supports field guards.
       "--no_use_field_guards",
+
       # TODO(FL-117): Re-enable causal async stack traces when this issue is
       # addressed.
       "--no_causal_async_stacks",
diff --git a/runtime/flutter_runner/component.cc b/runtime/flutter_runner/component.cc
index 4108142..8a54333 100644
--- a/runtime/flutter_runner/component.cc
+++ b/runtime/flutter_runner/component.cc
@@ -289,6 +289,9 @@
   // debugging (that is, with no bytecode), the VM will fall back on ASTs.
   settings_.dart_flags.push_back("--enable_interpreter");
 
+  // TODO(FL-208): Remove when field guards work.
+  settings_.dart_flags.push_back("--no_use_field_guards");
+
   auto dispatcher = async_get_default_dispatcher();
   const std::string component_url = package.resolved_url;
   settings_.unhandled_exception_callback =
diff --git a/runtime/flutter_runner/kernel/BUILD.gn b/runtime/flutter_runner/kernel/BUILD.gn
index 85b7cfa..7d5db67 100644
--- a/runtime/flutter_runner/kernel/BUILD.gn
+++ b/runtime/flutter_runner/kernel/BUILD.gn
@@ -88,7 +88,7 @@
       script = gen_snapshot
     }
     args = [
-      # TODO(zra): remove this when the interpreter supports field guards.
+      # TODO(FL-208): remove this when the interpreter supports field guards.
       "--no_use_field_guards",
 
       # TODO(FL-117): Re-enable causal async stack traces when this issue is