cc : Track ids for which active opacity always wins on property trees

cc/layers/layer.cc

 // Copyright 2010 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.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 487 matching lines @@
 }
 
 bool Layer::HasPotentiallyRunningOpacityAnimation() const {
   return layer_tree_host_->HasPotentiallyRunningOpacityAnimation(this);
 }
 
 bool Layer::OpacityCanAnimateOnImplThread() const {
   return false;
 }
 
+bool Layer::AlwaysUseActiveTreeOpacity() const {
+  return false;
+}
+
 void Layer::SetBlendMode(SkXfermode::Mode blend_mode) {
   DCHECK(IsPropertyChangeAllowed());
   if (blend_mode_ == blend_mode)
     return;
 
   // Allowing only blend modes that are defined in the CSS Compositing standard:
   // http://dev.w3.org/fxtf/compositing-1/#blending
   switch (blend_mode) {
     case SkXfermode::kSrcOver_Mode:
     case SkXfermode::kScreen_Mode:
@@ skipping 1268 matching lines @@
       ->data.num_copy_requests_in_subtree;
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, -1);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc