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

tools/clang/blink_gc_plugin/tests/destructor_in_nonfinalized_class.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 "destructor_in_nonfinalized_class.h"
 
 namespace blink {
 
 HeapObject::~HeapObject()
 {
     // Do something when destructed...
     (void)this;
 }
 
-void HeapObject::trace(Visitor* visitor)
+void HeapObject::Trace(Visitor* visitor)
 {
-    visitor->trace(m_obj);
+    visitor->Trace(m_obj);
 }
 
 }