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

tools/clang/blink_gc_plugin/tests/legacy_naming/crash_on_invalid.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.
 
 // Regression test for http://crbug.com/421958
 
 #ifndef CRASH_ON_INVALID_H_
 #define CRASH_ON_INVALID_H_
 
 namespace blink {
 
 class Visitor;
 class GamepadCommon {};
 class ScriptWrappable {};
 
 class Gamepad final : public GarbageCollectedFinalized<Gamepad>,
                       public GamepadCommon,
                       public ScriptWrappable {
 public:
     virtual const WrapperTypeInfo *wrapperTypeInfo() const {}
     void trace(Visitor *);
 };
 
 }
 
 #endif