blink: Cleanup class/struct forward declarations

third_party/WebKit/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 21 matching lines @@
 #include "WebDoublePoint.h"
 #include "WebFloatPoint3D.h"
 #include "WebFloatSize.h"
 #include "WebPoint.h"
 #include "WebRect.h"
 #include "WebSize.h"
 #include "WebString.h"
 #include "WebVector.h"
 
 class SkMatrix44;
-class SkImageFilter;
 
 namespace cc {
 class Layer;
 class LayerClient;
 class FilterOperations;
 struct ElementId;
 }
 
 namespace blink {
 
@@ skipping 166 matching lines @@
   virtual uint32_t compositorMutableProperties() const = 0;
 
   virtual void setHasWillChangeTransformHint(bool) = 0;
   virtual void setPreferredRasterBounds(const WebSize&) = 0;
   virtual void clearPreferredRasterBounds() = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebLayer_h