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

tools/clang/blink_gc_plugin/tests/destructor_eagerly_finalized.cpp

 // 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.
 
 #include "destructor_eagerly_finalized.h"
 
 namespace blink {
 
 HeapObjectEagerFinalized::~HeapObjectEagerFinalized()
 {
     // Valid access to a non-eagerly finalized field
     m_obj->foo();
 }
 
-void HeapObjectEagerFinalized::trace(Visitor* visitor)
+void HeapObjectEagerFinalized::Trace(Visitor* visitor)
 {
-    visitor->trace(m_obj);
+    visitor->Trace(m_obj);
 }
 
 HeapObjectEagerFinalizedAlso::~HeapObjectEagerFinalizedAlso()
 {
     // Valid access to a non-eagerly finalized field
     m_heapObject->foo();
 
     // Non-valid accesses to eagerly finalized fields.
     m_heapObjectFinalized->foo();
     m_heapVector[0]->foo();
 }
 
-void HeapObjectEagerFinalizedAlso::trace(Visitor* visitor)
+void HeapObjectEagerFinalizedAlso::Trace(Visitor* visitor)
 {
-    visitor->trace(m_heapObject);
-    visitor->trace(m_heapObjectFinalized);
-    visitor->trace(m_heapVector);
+    visitor->Trace(m_heapObject);
+    visitor->Trace(m_heapObjectFinalized);
+    visitor->Trace(m_heapVector);
 }
 
 } // namespace blink