Cleanup namespace usage in public/platform/Web[A-M]*.h.

public/platform/WebLayer.h

 /*
  * Copyright (C) 2011 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 23 matching lines @@
 #include "WebPoint.h"
 #include "WebRect.h"
 #include "WebSize.h"
 #include "WebString.h"
 #include "WebVector.h"
 
 class SkMatrix44;
 class SkImageFilter;
 
 namespace blink {
+
 class WebCompositorAnimationDelegate;
 class WebFilterOperations;
 class WebLayerClient;
 class WebLayerScrollClient;
 struct WebFloatPoint;
 struct WebFloatRect;
 struct WebLayerPositionConstraint;
 
 class WebLayer {
 public:
@@ skipping 153 matching lines @@
 
     // True if the layer is not part of a tree attached to a WebLayerTreeView.
     virtual bool isOrphan() const = 0;
 
     virtual void setWebLayerClient(WebLayerClient*) = 0;
 };
 
 } // namespace blink
 
 #endif // WebLayer_h