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

tools/clang/blink_gc_plugin/tests/fields_illegal_tracing.h

 // Copyright 2016 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 FIELDS_ILLEGAL_TRACING_H_
 #define FIELDS_ILLEGAL_TRACING_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
 
 namespace bar {
 
 // check that (only) std::unique_ptr<> is reported
 // as an illegal smart pointer type.
 template<typename T> class unique_ptr {
 public:
     ~unique_ptr() { }
     operator T*() const { return 0; }
     T* operator->() { return 0; }
 
-    void trace(Visitor* visitor)
+    void Trace(Visitor* visitor)
     {
     }
 };
 
 }
 
 class HeapObject;
 class PartObject;
 
 class PartObject {
     DISALLOW_NEW();
 public:
-    void trace(Visitor*);
+    void Trace(Visitor*);
 private:
     OwnPtr<HeapObject> m_obj1;
     RefPtr<HeapObject> m_obj2;
     bar::unique_ptr<HeapObject> m_obj3;
     std::unique_ptr<HeapObject> m_obj4;
     Vector<int>::iterator m_iterator1;
     HeapVector<Member<HeapObject>>::iterator m_iterator2;
     HeapHashSet<PartObject>::const_iterator m_iterator3;
 };
 
 class HeapObject : public GarbageCollectedFinalized<HeapObject> {
 public:
-    void trace(Visitor*);
+    void Trace(Visitor*);
 private:
     PartObject m_part;
     OwnPtr<HeapObject> m_obj1;
     RefPtr<HeapObject> m_obj2;
     bar::unique_ptr<HeapObject> m_obj3;
     std::unique_ptr<HeapObject> m_obj4;
     HeapHashMap<int, Member<HeapObject>>::reverse_iterator m_iterator3;
     HeapDeque<Member<HeapObject>>::const_reverse_iterator m_iterator4;
     HeapListHashSet<Member<HeapObject>>::const_iterator m_iterator5;
     HeapLinkedHashSet<Member<HeapObject>>::const_iterator m_iterator6;
 };
 
 }
 
 #endif