cc: Move RenderTarget Information to Effect Tree

cc/trees/occlusion_tracker.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 CC_TREES_OCCLUSION_TRACKER_H_
 #define CC_TREES_OCCLUSION_TRACKER_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 30 matching lines @@
       const gfx::Transform& draw_transform) const;
 
   // Called at the beginning of each step in the LayerIterator's front-to-back
   // traversal.
   void EnterLayer(const LayerIteratorPosition& layer_iterator);
   // Called at the end of each step in the LayerIterator's front-to-back
   // traversal.
   void LeaveLayer(const LayerIteratorPosition& layer_iterator);
 
   // Gives the region of the screen that is not occluded by something opaque.
-  Region ComputeVisibleRegionInScreen() const;
+  Region ComputeVisibleRegionInScreen(const LayerTreeImpl* layer_tree) const;
 
   void set_minimum_tracking_size(const gfx::Size& size) {
     minimum_tracking_size_ = size;
   }
 
  protected:
   struct StackObject {
     StackObject() : target(0) {}
-    explicit StackObject(const LayerImpl* target) : target(target) {}
-    const LayerImpl* target;
+    explicit StackObject(const RenderSurfaceImpl* target) : target(target) {}
+    const RenderSurfaceImpl* target;
     SimpleEnclosedRegion occlusion_from_outside_target;
     SimpleEnclosedRegion occlusion_from_inside_target;
   };
 
   // The stack holds occluded regions for subtrees in the
   // RenderSurfaceImpl-Layer tree, so that when we leave a subtree we may apply
   // a mask to it, but not to the parts outside the subtree.
   // - The first time we see a new subtree under a target, we add that target to
   // the top of the stack. This can happen as a layer representing itself, or as
   // a target surface.
@@ skipping 29 matching lines @@
 
   gfx::Rect screen_space_clip_rect_;
   gfx::Size minimum_tracking_size_;
 
   DISALLOW_COPY_AND_ASSIGN(OcclusionTracker);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_OCCLUSION_TRACKER_H_