SurfaceAggregator should check whether output is secure when drawin

cc/trees/layer_tree_impl.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_LAYER_TREE_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 361 matching lines @@
   void FinishSwapPromises(CompositorFrameMetadata* metadata);
   void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
 
   void DidModifyTilePriorities();
 
   ResourceId ResourceIdForUIResource(UIResourceId uid) const;
   void ProcessUIResourceRequestQueue();
 
   bool IsUIResourceOpaque(UIResourceId uid) const;
 
-  bool OutputIsSecure() const;
-
   void RegisterPictureLayerImpl(PictureLayerImpl* layer);
   void UnregisterPictureLayerImpl(PictureLayerImpl* layer);
   const std::vector<PictureLayerImpl*>& picture_layers() const {
     return picture_layers_;
   }
 
   void RegisterScrollbar(ScrollbarLayerImplBase* scrollbar_layer);
   void UnregisterScrollbar(ScrollbarLayerImplBase* scrollbar_layer);
   ScrollbarSet ScrollbarsFor(int scroll_layer_id) const;
 
@@ skipping 196 matching lines @@
 
   std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_