SurfaceAggregator should check whether output is secure when drawin

cc/trees/layer_tree_impl.cc

 // 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.
 
 #include "cc/trees/layer_tree_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1379 matching lines @@
 }
 
 ResourceId LayerTreeImpl::ResourceIdForUIResource(UIResourceId uid) const {
   return layer_tree_host_impl_->ResourceIdForUIResource(uid);
 }
 
 bool LayerTreeImpl::IsUIResourceOpaque(UIResourceId uid) const {
   return layer_tree_host_impl_->IsUIResourceOpaque(uid);
 }
 
-bool LayerTreeImpl::OutputIsSecure() const {
-  return layer_tree_host_impl_->output_is_secure();
-}
-
 void LayerTreeImpl::ProcessUIResourceRequestQueue() {
   for (const auto& req : ui_resource_request_queue_) {
     switch (req.GetType()) {
       case UIResourceRequest::UI_RESOURCE_CREATE:
         layer_tree_host_impl_->CreateUIResource(req.GetId(), req.GetBitmap());
         break;
       case UIResourceRequest::UI_RESOURCE_DELETE:
         layer_tree_host_impl_->DeleteUIResource(req.GetId());
         break;
       case UIResourceRequest::UI_RESOURCE_INVALID_REQUEST:
@@ skipping 684 matching lines @@
 }
 
 void LayerTreeImpl::ResetAllChangeTracking(PropertyTrees::ResetFlags flag) {
   layers_that_should_push_properties_.clear();
   for (auto* layer : *this)
     layer->ResetChangeTracking();
   property_trees_.ResetAllChangeTracking(flag);
 }
 
 }  // namespace cc