SurfaceAggregator should check whether output is secure when drawin

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 140 matching lines @@
 
   // For compatibility with Layer.
   bool has_render_surface() const { return !!render_surface(); }
 
   void PassCopyRequests(
       std::vector<std::unique_ptr<CopyOutputRequest>>* requests);
   // Can only be called when the layer has a copy request.
   void TakeCopyRequestsAndTransformToTarget(
       std::vector<std::unique_ptr<CopyOutputRequest>>* request);
   bool HasCopyRequest() const { return !copy_requests_.empty(); }
-  bool InsideCopyRequest() const;
 
   void SetMaskLayer(std::unique_ptr<LayerImpl> mask_layer);
   LayerImpl* mask_layer() { return mask_layer_; }
   const LayerImpl* mask_layer() const { return mask_layer_; }
   std::unique_ptr<LayerImpl> TakeMaskLayer();
 
   void SetReplicaLayer(std::unique_ptr<LayerImpl> replica_layer);
   LayerImpl* replica_layer() { return replica_layer_; }
   const LayerImpl* replica_layer() const { return replica_layer_; }
   std::unique_ptr<LayerImpl> TakeReplicaLayer();
@@ skipping 488 matching lines @@
   bool scrolls_drawn_descendant_;
   // If true, the layer or one of its descendants has a touch handler.
   bool layer_or_descendant_has_touch_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_