SurfaceAggregator should check whether output is secure when drawin

cc/trees/layer_tree_host_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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 572 matching lines @@
       std::unique_ptr<ResourcePool>* resource_pool);
 
   bool prepare_tiles_needed() const { return tile_priorities_dirty_; }
 
   gfx::Vector2dF ScrollSingleNode(ScrollNode* scroll_node,
                                   const gfx::Vector2dF& delta,
                                   const gfx::Point& viewport_point,
                                   bool is_direct_manipulation,
                                   ScrollTree* scroll_tree);
 
-  void set_output_is_secure(bool output_is_secure) {
-    output_is_secure_ = output_is_secure;
-  }
-
-  bool output_is_secure() const { return output_is_secure_; }
-
   base::SingleThreadTaskRunner* GetTaskRunner() const {
     DCHECK(task_runner_provider_);
     return task_runner_provider_->HasImplThread()
                ? task_runner_provider_->ImplThreadTaskRunner()
                : task_runner_provider_->MainThreadTaskRunner();
   }
 
   InputHandler::ScrollStatus TryScroll(const gfx::PointF& screen_space_point,
                                        InputHandler::ScrollInputType type,
                                        const ScrollTree& scroll_tree,
@@ skipping 196 matching lines @@
   // glViewport/window projection matrix.
   // - external_clip_ specifies a top-level clip rect
   // - viewport_rect_for_tile_priority_ is the rect in view space used for
   // tiling priority.
   gfx::Transform external_transform_;
   gfx::Rect external_viewport_;
   gfx::Rect external_clip_;
   gfx::Rect viewport_rect_for_tile_priority_;
   bool resourceless_software_draw_;
 
-  bool output_is_secure_;
-
   gfx::Rect viewport_damage_rect_;
 
   std::unique_ptr<AnimationHost> animation_host_;
   std::set<VideoFrameController*> video_frame_controllers_;
 
   // Map from scroll layer ID to scrollbar animation controller.
   // There is one animation controller per pair of overlay scrollbars.
   std::unordered_map<int, std::unique_ptr<ScrollbarAnimationController>>
       scrollbar_animation_controllers_;
 
@@ skipping 18 matching lines @@
   std::unique_ptr<Viewport> viewport_;
 
   LayerTreeMutator* mutator_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_