Add CCDelegatingRenderer, and corresponding IPCs

cc/CCOcclusionTracker.h

 // Copyright 2012 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 CCOcclusionTracker_h
 #define CCOcclusionTracker_h
 
 #include "base/basictypes.h"
 #include "CCLayerIterator.h"
 #include "FloatQuad.h"
@@ skipping 17 matching lines @@
     CCOcclusionTrackerBase(IntRect rootTargetRect, bool recordMetricsForFrame);
 
     // Called at the beginning of each step in the CCLayerIterator's front-to-back traversal.
     void enterLayer(const CCLayerIteratorPosition<LayerType>&);
     // Called at the end of each step in the CCLayerIterator's front-to-back traversal.
     void leaveLayer(const CCLayerIteratorPosition<LayerType>&);
 
     // Returns true if the given rect in content space for the layer is fully occluded in either screen space or the layer's target surface.
     bool occluded(const LayerType*, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface = 0) const;
     // Gives an unoccluded sub-rect of |contentRect| in the content space of the layer. Used when considering occlusion for a layer that paints/draws something.
-    IntRect unoccludedContentRect(const LayerType*, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface = 0) const;
+    IntRect unoccludedContentRect(const LayerType*, const IntRect& contentRect, const WebKit::WebTransformationMatrix& drawTransform, bool transformsToTargetKnown, const IntRect& clipRectInTarget, bool* hasOcclusionFromOutsideTargetSurface = 0) const;
 
     // Gives an unoccluded sub-rect of |contentRect| in the content space of the renderTarget owned by the layer.
     // Used when considering occlusion for a contributing surface that is rendering into another target.
     IntRect unoccludedContributingSurfaceContentRect(const LayerType*, bool forReplica, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface = 0) const;
 
     // Report operations for recording overdraw metrics.
     CCOverdrawMetrics& overdrawMetrics() const { return *m_overdrawMetrics.get(); }
 
     // Gives the region of the screen that is not occluded by something opaque.
     Region computeVisibleRegionInScreen() const { return subtract(Region(m_rootTargetRect), m_stack.last().occlusionInScreen); }
@@ skipping 47 matching lines @@
     Vector<IntRect>* m_occludingScreenSpaceRects;
 
     DISALLOW_COPY_AND_ASSIGN(CCOcclusionTrackerBase);
 };
 
 typedef CCOcclusionTrackerBase<LayerChromium, RenderSurfaceChromium> CCOcclusionTracker;
 typedef CCOcclusionTrackerBase<CCLayerImpl, CCRenderSurface> CCOcclusionTrackerImpl;
 
 }
 #endif // CCOcclusionTracker_h