Implement SkImageFilter support in the compositor.

cc/damage_tracker.h

 // Copyright 2011 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 CCDamageTracker_h
 #define CCDamageTracker_h
 
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "FloatRect.h"
 #include <vector>
 
 namespace WebKit {
 class WebFilterOperations;
 }
 
+class SkImageFilter;
+
 namespace cc {
 
 class CCLayerImpl;
 class CCRenderSurface;
 
 // Computes the region where pixels have actually changed on a RenderSurface. This region is used
 // to scissor what is actually drawn to the screen to save GPU computation and bandwidth.
 class CCDamageTracker {
 public:
     static scoped_ptr<CCDamageTracker> create();
     ~CCDamageTracker();
 
     void didDrawDamagedArea() { m_currentDamageRect = FloatRect(); }
     void forceFullDamageNextUpdate() { m_forceFullDamageNextUpdate = true; }
-    void updateDamageTrackingState(const std::vector<CCLayerImpl*>& layerList, int targetSurfaceLayerID, bool targetSurfacePropertyChangedOnlyFromDescendant, const IntRect& targetSurfaceContentRect, CCLayerImpl* targetSurfaceMaskLayer, const WebKit::WebFilterOperations&);
+    void updateDamageTrackingState(const std::vector<CCLayerImpl*>& layerList, int targetSurfaceLayerID, bool targetSurfacePropertyChangedOnlyFromDescendant, const IntRect& targetSurfaceContentRect, CCLayerImpl* targetSurfaceMaskLayer, const WebKit::WebFilterOperations&, SkImageFilter* filter);
 
     const FloatRect& currentDamageRect() { return m_currentDamageRect; }
 
 private:
     CCDamageTracker();
 
     FloatRect trackDamageFromActiveLayers(const std::vector<CCLayerImpl*>& layerList, int targetSurfaceLayerID);
     FloatRect trackDamageFromSurfaceMask(CCLayerImpl* targetSurfaceMaskLayer);
     FloatRect trackDamageFromLeftoverRects();
 
@@ skipping 11 matching lines @@
     scoped_ptr<RectMap> m_currentRectHistory;
     scoped_ptr<RectMap> m_nextRectHistory;
 
     FloatRect m_currentDamageRect;
     bool m_forceFullDamageNextUpdate;
 };
 
 } // namespace cc
 
 #endif // CCDamageTracker_h