cc :: Move tracking of layer_property_changed to main thread (2)

cc/trees/layer_tree_host_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_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1686 matching lines @@
 
   // The next frame should start by assuming nothing has changed, and changes
   // are noted as they occur.
   // TODO(boliu): If we did a temporary software renderer frame, propogate the
   // damage forward to the next frame.
   for (size_t i = 0; i < frame->render_surface_layer_list->size(); i++) {
     (*frame->render_surface_layer_list)[i]->render_surface()->damage_tracker()->
         DidDrawDamagedArea();
   }
   active_tree_->root_layer()->ResetAllChangeTrackingForSubtree();
+  active_tree_->root_layer()
+      ->layer_tree_impl()
+      ->property_trees()
+      ->transform_tree.ResetChangeTracking();
 
   active_tree_->set_has_ever_been_drawn(true);
   devtools_instrumentation::DidDrawFrame(id_);
   benchmark_instrumentation::IssueImplThreadRenderingStatsEvent(
       rendering_stats_instrumentation_->impl_thread_rendering_stats());
   rendering_stats_instrumentation_->AccumulateAndClearImplThreadStats();
 }
 
 void LayerTreeHostImpl::DidDrawAllLayers(const FrameData& frame) {
   for (size_t i = 0; i < frame.will_draw_layers.size(); ++i)
@@ skipping 267 matching lines @@
 
     if (pending_tree_->needs_full_tree_sync()) {
       active_tree_->SetRootLayer(
           TreeSynchronizer::SynchronizeTrees(pending_tree_->root_layer(),
                                              active_tree_->DetachLayerTree(),
                                              active_tree_.get()));
     }
     TreeSynchronizer::PushProperties(pending_tree_->root_layer(),
                                      active_tree_->root_layer());
     pending_tree_->PushPropertiesTo(active_tree_.get());
+    if (pending_tree_->root_layer()) {
+      pending_tree_->root_layer()
+          ->layer_tree_impl()
+          ->property_trees()
+          ->transform_tree.ResetChangeTracking();
+    }
 
     // Now that we've synced everything from the pending tree to the active
     // tree, rename the pending tree the recycle tree so we can reuse it on the
     // next sync.
     DCHECK(!recycle_tree_);
     pending_tree_.swap(recycle_tree_);
 
     UpdateViewportContainerSizes();
 
     // If we commit to the active tree directly, this is already done during
@@ skipping 1863 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc