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

cc/trees/damage_tracker_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/damage_tracker.h"
 
 #include <stddef.h>
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
@@ skipping 1191 matching lines @@
   // leftover from the previous case.
   ClearDamageForAllSurfaces(root.get());
   EmulateDrawingOneFrame(root.get());
   child_damage_rect =
           child->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_TRUE(child_damage_rect.IsEmpty());
 
   // Then test mask removal.
   ClearDamageForAllSurfaces(root.get());
   child->SetMaskLayer(nullptr);
+  child->NoteLayerPropertyChanged();
   ASSERT_TRUE(child->LayerPropertyChanged());
   EmulateDrawingOneFrame(root.get());
 
   // Sanity check that a render surface still exists.
   ASSERT_TRUE(child->render_surface());
 
   child_damage_rect =
           child->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_EQ(gfx::Rect(30, 30).ToString(), child_damage_rect.ToString());
 }
@@ skipping 247 matching lines @@
     gfx::Rect root_damage_rect =
         root->render_surface()->damage_tracker()->current_damage_rect();
     gfx::Rect damage_we_care_about = gfx::Rect(i, i);
     EXPECT_LE(damage_we_care_about.right(), root_damage_rect.right());
     EXPECT_LE(damage_we_care_about.bottom(), root_damage_rect.bottom());
   }
 }
 
 }  // namespace
 }  // namespace cc