Build property trees for the HUD layer when using layer lists

cc/trees/layer_tree_host.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_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 670 matching lines @@
           gfx::Rect(device_viewport_size_), identity_transform, property_trees);
       TRACE_EVENT_INSTANT1(
           "cc", "LayerTreeHostInProcess::UpdateLayers_BuiltPropertyTrees",
           TRACE_EVENT_SCOPE_THREAD, "property_trees",
           property_trees->AsTracedValue());
     } else {
       TRACE_EVENT_INSTANT1(
           "cc", "LayerTreeHostInProcess::UpdateLayers_ReceivedPropertyTrees",
           TRACE_EVENT_SCOPE_THREAD, "property_trees",
           property_trees->AsTracedValue());
+      // The HUD layer is managed outside the layer list sent to LayerTreeHost
+      // and needs to have its property tree state initialized.
+      if (hud_layer_.get())
+        root_layer->copyPropertyTreeStateTo(hud_layer_.get());
     }
     draw_property_utils::UpdatePropertyTrees(this, property_trees,
                                              can_render_to_separate_surface);
     draw_property_utils::FindLayersThatNeedUpdates(this, property_trees,
                                                    &update_layer_list);
   }
 
   for (const auto& layer : update_layer_list)
     layer->SavePaintProperties();
 
@@ skipping 645 matching lines @@
 LayerListReverseIterator<Layer> LayerTreeHost::rend() {
   return LayerListReverseIterator<Layer>(nullptr);
 }
 
 void LayerTreeHost::SetNeedsDisplayOnAllLayers() {
   for (auto* layer : *this)
     layer->SetNeedsDisplay();
 }
 
 }  // namespace cc