blink: Cleanup class/struct forward declarations

third_party/WebKit/public/platform/WebDisplayItemList.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebDisplayItemList_h
 #define WebDisplayItemList_h
 
 #include "WebBlendMode.h"
 #include "WebFloatPoint.h"
 #include "WebFloatRect.h"
 #include "WebRect.h"
 #include "WebSize.h"
 #include "WebVector.h"
 
 #include "third_party/skia/include/core/SkBlendMode.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "third_party/skia/include/core/SkRegion.h"
 
 class SkColorFilter;
-class SkImageFilter;
 class SkMatrix44;
 class SkPicture;
 struct SkRect;
 class SkRRect;
 
 namespace cc {
 class FilterOperations;
 }
 
 namespace gfx {
@@ skipping 46 matching lines @@
   // Specifies the color space that the inputs of this display list were
   // pre-converted into. If this is specified, then rasterization must not
   // perform any color correction, and the result must be interpreted as being
   // in this color space.
   virtual void setImpliedColorSpace(const gfx::ColorSpace&) {}
 };
 
 }  // namespace blink
 
 #endif  // WebDisplayItemList_h