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

tools/clang/blink_gc_plugin/tests/class_multiple_trace_bases.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.
 
 #ifndef CLASS_MULTIPLE_TRACE_BASES_H_
 #define CLASS_MULTIPLE_TRACE_BASES_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
 
 class Base : public GarbageCollected<Base> {
 public:
-    virtual void trace(Visitor*);
+    virtual void Trace(Visitor*);
 };
 
 class Mixin1 : public GarbageCollectedMixin {
 public:
-    void trace(Visitor*);
+    void Trace(Visitor*);
 };
 
 class Mixin2 : public GarbageCollectedMixin {
 public:
-    void trace(Visitor*);
+    void Trace(Visitor*);
 };
 
 class Derived1 : public Base, public Mixin1 {
     USING_GARBAGE_COLLECTED_MIXIN(Derived1);
-    // Requires trace method.
+    // Requires Trace method.
 };
 
 class Derived2 : public Base, public Mixin1, public Mixin2 {
     USING_GARBAGE_COLLECTED_MIXIN(Derived2);
-    void trace(Visitor*) override;
+    void Trace(Visitor*) override;
 };
 
 }
 
 #endif