compositor-worker: plumb element id and mutable properties

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 <set>
 #include <string>
 #include <vector>
@@ skipping 507 matching lines @@
   // TODO(weiliangc): this should move to the effect tree.
   void set_num_layer_or_descendant_with_copy_request(
       int num_layer_or_descendants_with_copy_request) {
     num_layer_or_descendants_with_copy_request_ =
         num_layer_or_descendants_with_copy_request;
   }
   int num_layer_or_descendants_with_copy_request() {
     return num_layer_or_descendants_with_copy_request_;
   }
 
+  void SetElementId(uint64_t id);
+  uint64_t element_id() const { return element_id_; }
+
+  void SetMutableProperties(uint32_t properties);
+  uint32_t mutable_properties() const { return mutable_properties_; }
+
   void set_visited(bool visited);
   bool visited();
   void set_layer_or_descendant_is_drawn(bool layer_or_descendant_is_drawn);
   bool layer_or_descendant_is_drawn();
   void set_sorted_for_recursion(bool sorted_for_recursion);
   bool sorted_for_recursion();
 
   // LayerAnimationValueProvider implementation.
   gfx::ScrollOffset ScrollOffsetForAnimation() const override;
 
@@ skipping 129 matching lines @@
   // This variable indicates which ancestor layer (if any) whose size,
   // transformed relative to this layer, defines the maximum scroll offset for
   // this layer.
   int scroll_clip_layer_id_;
   int num_descendants_that_draw_content_;
   int transform_tree_index_;
   int effect_tree_index_;
   int clip_tree_index_;
   int property_tree_sequence_number_;
   int num_layer_or_descendants_with_copy_request_;
+  uint64_t element_id_;
+  uint32_t mutable_properties_;
   gfx::Vector2dF offset_to_transform_parent_;
   bool should_flatten_transform_from_property_tree_ : 1;
   bool should_scroll_on_main_thread_ : 1;
   bool have_wheel_event_handlers_ : 1;
   bool have_scroll_event_handlers_ : 1;
   bool user_scrollable_horizontal_ : 1;
   bool user_scrollable_vertical_ : 1;
   bool is_root_for_isolated_group_ : 1;
   bool is_container_for_fixed_position_layers_ : 1;
   bool is_drawable_ : 1;
@@ skipping 55 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_