cc :: Move some tracking of layer_property_changed to main thread.

cc/trees/layer_tree_host_unittest.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 2842 matching lines @@
         // No layers need commit.
         break;
       case 11:
         layer_tree_host()->SetPageScaleFactorAndLimits(1.f, 0.8f, 1.1f);
         // No layers need commit.
         break;
       case 12:
         child_->MakePushProperties();
         // The modified layer needs commit
         ++expected_push_properties_child_;
+        ++expected_push_properties_grandchild_;
         break;
       case 13:
         child2_->MakePushProperties();
         // The modified layer needs commit
         ++expected_push_properties_child2_;
         break;
       case 14:
         child_->RemoveFromParent();
         root_->AddChild(child_);
         // Layers added to the tree get committed.
@@ skipping 139 matching lines @@
         ++expected_push_properties_grandchild_impl_;
         break;
       case 11:
         // The leaf that always pushes is pushed.
         ++expected_push_properties_grandchild_impl_;
         break;
       case 12:
         // The leaf that always pushes is pushed.
         ++expected_push_properties_grandchild_impl_;
 
-        // This child position was changed.
+        // This child position was changed. So the subtree needs to push
+        // properties.
         ++expected_push_properties_child2_impl_;
+        ++expected_push_properties_grandchild2_impl_;
         break;
       case 13:
         // The position of this child was changed.
         ++expected_push_properties_child_impl_;
 
         // The leaf that always pushes is pushed.
         ++expected_push_properties_grandchild_impl_;
         break;
       case 14:
         // Second child is removed from tree. Don't discard counts because
@@ skipping 3570 matching lines @@
     EndTest();
   }
 
   void AfterTest() override {}
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestPaintedDeviceScaleFactor);
 
 }  // namespace
 }  // namespace cc