Rename WebCore namespace to blink in Platform

Source/platform/Widget.h

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008 Collabora Ltd.  All rights reserved.
  * Copyright (C) 2013 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 16 matching lines @@
 
 #ifndef Widget_h
 #define Widget_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntRect.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
-namespace WebCore {
+namespace blink {
 
 class Event;
 class GraphicsContext;
 class HostWindow;
 
 // The Widget class serves as a base class for three kinds of objects:
 // (1) Scrollable areas (ScrollView)
 // (2) Scrollbars (Scrollbar)
 // (3) Plugins (PluginView)
 //
@@ skipping 89 matching lines @@
     virtual void detach() { }
 #endif
 
 private:
     Widget* m_parent;
     IntRect m_frame;
     bool m_selfVisible;
     bool m_parentVisible;
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // Widget_h