SurfaceAggregator should check whether output is secure when drawin

cc/layers/layer_impl.cc

 // 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.
 
 #include "cc/layers/layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 239 matching lines @@
     gfx::Rect request_in_layer_space = request->area();
     request_in_layer_space.Intersect(gfx::Rect(bounds()));
     request->set_area(MathUtil::MapEnclosingClippedRect(
         DrawTransform(), request_in_layer_space));
   }
 
   layer_tree_impl()->RemoveLayerWithCopyOutputRequest(this);
   layer_tree_impl()->set_needs_update_draw_properties();
 }
 
-bool LayerImpl::InsideCopyRequest() const {
-  EffectTree& effect_tree = layer_tree_impl()->property_trees()->effect_tree;
-  EffectNode* node = effect_tree.Node(effect_tree_index_);
-
-  for (; node; node = effect_tree.parent(node)) {
-    if (node->data.has_copy_request)
-      return true;
-  }
-  return false;
-}
-
 void LayerImpl::ClearRenderSurfaceLayerList() {
   if (render_surface_)
     render_surface_->ClearLayerLists();
 }
 
 void LayerImpl::PopulateSharedQuadState(SharedQuadState* state) const {
   state->SetAll(draw_properties_.target_space_transform, bounds(),
                 draw_properties_.visible_layer_rect, draw_properties_.clip_rect,
                 draw_properties_.is_clipped, draw_properties_.opacity,
                 draw_blend_mode_, sorting_context_id_);
@@ skipping 1130 matching lines @@
            .layer_transforms_should_scale_layer_contents) {
     return default_scale;
   }
 
   gfx::Vector2dF transform_scales = MathUtil::ComputeTransform2dScaleComponents(
       DrawTransform(), default_scale);
   return std::max(transform_scales.x(), transform_scales.y());
 }
 
 }  // namespace cc