Rename WebKit namespace to blink

public/platform/WebImageLayer.h

 /*
  * Copyright (C) 2012 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 12 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebImageLayer_h
 #define WebImageLayer_h
 
 #include "WebCommon.h"
 #include "WebLayer.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
-namespace WebKit {
+namespace blink {
 
 class WebImageLayer {
 public:
     virtual ~WebImageLayer() { }
 
     virtual WebLayer* layer() = 0;
     virtual void setBitmap(SkBitmap) = 0;
 };
 
-} // namespace WebKit
+} // namespace blink
 
 #endif // WebImageLayer_h