Build property trees for the HUD layer when using layer lists

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>
 
 #include "base/atomic_sequence_num.h"
 #include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/base/simple_enclosed_region.h"
 #include "cc/input/main_thread_scrolling_reason.h"
+#include "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/layer_client.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/scrollbar_layer_interface.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/tiles/frame_viewer_instrumentation.h"
 #include "cc/trees/draw_property_utils.h"
 #include "cc/trees/effect_node.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_impl.h"
@@ skipping 1267 matching lines @@
     return;
   may_contain_video_ = yes;
   SetNeedsPushProperties();
 }
 
 void Layer::SetScrollbarsHiddenFromImplSide(bool hidden) {
   if (inputs_.client)
     inputs_.client->didChangeScrollbarsHidden(hidden);
 }
 
+void Layer::copyPropertyTreeStateTo(HeadsUpDisplayLayer* hud_layer) const {
+  // When not using layer lists the hud layer's properties should be built by
+  // PropertyTreeBuilder.
+  DCHECK(layer_tree_host_->GetSettings().use_layer_lists);
+
+  hud_layer->SetTransformTreeIndex(transform_tree_index_);
+  hud_layer->SetEffectTreeIndex(effect_tree_index_);
+  hud_layer->SetClipTreeIndex(clip_tree_index_);
+  hud_layer->SetScrollTreeIndex(scroll_tree_index_);
+  hud_layer->set_property_tree_sequence_number(property_tree_sequence_number_);
+}
+
 bool Layer::FilterIsAnimating() const {
   return GetMutatorHost()->IsAnimatingFilterProperty(
       element_id(), GetElementTypeForAnimation());
 }
 
 bool Layer::TransformIsAnimating() const {
   return GetMutatorHost()->IsAnimatingTransformProperty(
       element_id(), GetElementTypeForAnimation());
 }
 
@@ skipping 195 matching lines @@
       ->num_copy_requests_in_subtree;
 }
 
 gfx::Transform Layer::screen_space_transform() const {
   DCHECK_NE(transform_tree_index_, TransformTree::kInvalidNodeId);
   return draw_property_utils::ScreenSpaceTransform(
       this, layer_tree_host_->property_trees()->transform_tree);
 }
 
 }  // namespace cc