cc: Allow output readback/copy requests to specify a sub-rect to copy.

cc/layers/layer_impl.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 CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/logging.h"
@@ skipping 66 matching lines @@
   const OwnedLayerImplList& children() const { return children_; }
   OwnedLayerImplList& children() { return children_; }
   LayerImpl* child_at(size_t index) const { return children_[index]; }
   void AddChild(scoped_ptr<LayerImpl> child);
   scoped_ptr<LayerImpl> RemoveChild(LayerImpl* child);
   void set_parent(LayerImpl* parent) { parent_ = parent; }
   // Warning: This does not preserve tree structure invariants.
   void ClearChildList();
 
   void PassCopyRequests(ScopedPtrVector<CopyOutputRequest>* requests);
-  void TakeCopyRequests(ScopedPtrVector<CopyOutputRequest>* request);
+  void TakeCopyRequestsAndTransformToTarget(
+      ScopedPtrVector<CopyOutputRequest>* request);
   bool HasCopyRequest() const { return !copy_requests_.empty(); }
 
   void SetMaskLayer(scoped_ptr<LayerImpl> mask_layer);
   LayerImpl* mask_layer() { return mask_layer_.get(); }
   const LayerImpl* mask_layer() const { return mask_layer_.get(); }
   scoped_ptr<LayerImpl> TakeMaskLayer();
 
   void SetReplicaLayer(scoped_ptr<LayerImpl> replica_layer);
   LayerImpl* replica_layer() { return replica_layer_.get(); }
   const LayerImpl* replica_layer() const { return replica_layer_.get(); }
@@ skipping 472 matching lines @@
   // Group of properties that need to be computed based on the layer tree
   // hierarchy before layers can be drawn.
   DrawProperties<LayerImpl, RenderSurfaceImpl> draw_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_