Add use-chromium-style-naming option to Blink GC plugin.

tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp

Index: tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
diff --git a/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp b/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
index f33cd398757f420d6bff6bf832f62863ee94c5b7..c3e277a7ae16c83f85eaba86dd7c772e4181c2f9 100644
--- a/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
+++ b/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
@@ -75,6 +75,9 @@ BlinkGCPluginConsumer::BlinkGCPluginConsumer(
 
   // Ignore GC implementation files.
   options_.ignored_directories.push_back("/heap/");
+
+  if (!options_.use_chromium_style_naming)
+    Config::UseLegacyNames();
 }
 
 void BlinkGCPluginConsumer::HandleTranslationUnit(ASTContext& context) {