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

tools/clang/blink_gc_plugin/tests/stack_allocated.cpp

 // 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.
 
 #include "stack_allocated.h"
 
 namespace blink {
 
 // Verify that anon namespaces are checked.
 namespace {
 
 class AnonStackObject : public StackObject {
 public:
     HeapObject* m_obj;
 };
 
 }
 
-void HeapObject::trace(Visitor* visitor)
+void HeapObject::Trace(Visitor* visitor)
 {
 }
 
 }