Cleanup namespace usage in platform/graphics/[G-S]*

Source/platform/graphics/GraphicsLayerDebugInfo.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 14 matching lines @@
 
 namespace blink {
 
 GraphicsLayerDebugInfo::GraphicsLayerDebugInfo()
     : m_compositingReasons(CompositingReasonNone)
 {
 }
 
 GraphicsLayerDebugInfo::~GraphicsLayerDebugInfo() { }
 
-void GraphicsLayerDebugInfo::appendAsTraceFormat(blink::WebString* out) const
+void GraphicsLayerDebugInfo::appendAsTraceFormat(WebString* out) const
 {
     RefPtr<JSONObject> jsonObject = JSONObject::create();
     appendLayoutRects(jsonObject.get());
     appendCompositingReasons(jsonObject.get());
     appendDebugName(jsonObject.get());
     appendOwnerNodeId(jsonObject.get());
     *out = jsonObject->toJSONString();
 }
 
 GraphicsLayerDebugInfo* GraphicsLayerDebugInfo::clone() const
@@ skipping 44 matching lines @@
 
 void GraphicsLayerDebugInfo::appendOwnerNodeId(JSONObject* jsonObject) const
 {
     if (!m_ownerNodeId)
         return;
 
     jsonObject->setNumber("owner_node", m_ownerNodeId);
 }
 
 } // namespace blink