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

tools/clang/blink_gc_plugin/tests/class_overrides_new.h

 // 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.
 
 #ifndef CLASS_OVERRIDES_NEW_H_
 #define CLASS_OVERRIDES_NEW_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
 
 class HeapObject : public GarbageCollected<HeapObject> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
-    void trace(Visitor*) { }
+    void Trace(Visitor*) { }
 };
 
 }
 
 #endif