cc: Move copy requests from layers to the effect tree

cc/layers/layer.h

 // Copyright 2010 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_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 88 matching lines @@
   // This requests the layer and its subtree be rendered and given to the
   // callback. If the copy is unable to be produced (the layer is destroyed
   // first), then the callback is called with a nullptr/empty result. If the
   // request's source property is set, any prior uncommitted requests having the
   // same source will be aborted.
   void RequestCopyOfOutput(std::unique_ptr<CopyOutputRequest> request);
   bool HasCopyRequest() const {
     return !copy_requests_.empty();
   }
 
+  void TakeCopyRequests(
+      std::vector<std::unique_ptr<CopyOutputRequest>>* requests);
+
   virtual void SetBackgroundColor(SkColor background_color);
   SkColor background_color() const { return background_color_; }
   void SetSafeOpaqueBackgroundColor(SkColor background_color);
   // If contents_opaque(), return an opaque color else return a
   // non-opaque color.  Tries to return background_color(), if possible.
   SkColor SafeOpaqueBackgroundColor() const;
 
   // A layer's bounds are in logical, non-page-scaled pixels (however, the
   // root layer's bounds are in physical pixels).
   void SetBounds(const gfx::Size& bounds);
@@ skipping 561 matching lines @@
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_