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

tools/clang/blink_gc_plugin/tests/destructor_eagerly_finalized.h

 // Copyright 2015 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 DESTRUCTOR_EAGERLY_FINALIZED_H_
 #define DESTRUCTOR_EAGERLY_FINALIZED_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
 
 class HeapObject : public GarbageCollected<HeapObject> {
 public:
-    void trace(Visitor*) { }
+    void Trace(Visitor*) { }
     void foo() { }
 };
 
 class HeapObjectEagerFinalized
     : public GarbageCollectedFinalized<HeapObjectEagerFinalized> {
 public:
     EAGERLY_FINALIZED();
     ~HeapObjectEagerFinalized();
-    void trace(Visitor*);
+    void Trace(Visitor*);
 
     void foo() { }
 
 private:
     Member<HeapObject> m_obj;
 };
 
 // Accessing other eagerly finalized objects during finalization is not allowed.
 class HeapObjectEagerFinalizedAlso
     : public GarbageCollectedFinalized<HeapObjectEagerFinalizedAlso> {
 public:
     EAGERLY_FINALIZED();
     ~HeapObjectEagerFinalizedAlso();
-    void trace(Visitor*);
+    void Trace(Visitor*);
 
 private:
     Member<HeapObject> m_heapObject;
     Member<HeapObjectEagerFinalized> m_heapObjectFinalized;
     HeapVector<Member<HeapObjectEagerFinalized>> m_heapVector;
 };
 
 } // namespace blink
 
 #endif // DESTRUCTOR_EAGERLY_FINALIZED_H_