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

cc/layers/layer.h

 // 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.
 
 #ifndef CC_LAYERS_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 522 matching lines @@
   void set_clip_rect(const gfx::Rect& rect) { clip_rect_ = rect; }
 
   // This should only be called during BeginMainFrame since it does not trigger
   // a Commit. This is called right after property tree being built and should
   // not trigger property tree rebuild.
   void SetHasRenderSurface(bool has_render_surface);
   bool has_render_surface() const {
     return has_render_surface_;
   }
 
+  void SetSubtreePropertyChanged();
+  bool subtree_property_changed() const { return subtree_property_changed_; }
+
   // Sets new frame timing requests for this layer.
   void SetFrameTimingRequests(const std::vector<FrameTimingRequest>& requests);
 
   // Accessor for unit tests
   const std::vector<FrameTimingRequest>& FrameTimingRequests() const {
     return frame_timing_requests_;
   }
 
   void DidBeginTracing();
 
@@ skipping 183 matching lines @@
   bool masks_to_bounds_ : 1;
   bool contents_opaque_ : 1;
   bool double_sided_ : 1;
   bool should_flatten_transform_ : 1;
   bool use_parent_backface_visibility_ : 1;
   bool use_local_transform_for_backface_visibility_ : 1;
   bool should_check_backface_visibility_ : 1;
   bool force_render_surface_ : 1;
   bool transform_is_invertible_ : 1;
   bool has_render_surface_ : 1;
+  bool subtree_property_changed_ : 1;
   Region non_fast_scrollable_region_;
   Region touch_event_handler_region_;
   gfx::PointF position_;
   SkColor background_color_;
   float opacity_;
   SkXfermode::Mode blend_mode_;
   // draw_blend_mode may be different than blend_mode_,
   // when a RenderSurface re-parents the layer's blend_mode.
   SkXfermode::Mode draw_blend_mode_;
   FilterOperations filters_;
@@ skipping 34 matching lines @@
 
   std::vector<FrameTimingRequest> frame_timing_requests_;
   bool frame_timing_requests_dirty_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_