cc: Replace render surface layer list with a render surface list

cc/trees/layer_tree_impl.h

 // Copyright 2012 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_TREES_LAYER_TREE_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 275 matching lines @@
 
   void ForceRedrawNextActivation() { next_activation_forces_redraw_ = true; }
 
   void set_has_ever_been_drawn(bool has_drawn) {
     has_ever_been_drawn_ = has_drawn;
   }
   bool has_ever_been_drawn() const { return has_ever_been_drawn_; }
 
   void set_ui_resource_request_queue(UIResourceRequestQueue queue);
 
-  const LayerImplList& RenderSurfaceLayerList() const;
+  const RenderSurfaceList& GetRenderSurfaceList() const;
   const Region& UnoccludedScreenSpaceRegion() const;
 
   // These return the size of the root scrollable area and the size of
   // the user-visible scrolling viewport, in CSS layout coordinates.
   gfx::SizeF ScrollableSize() const;
   gfx::SizeF ScrollableViewportSize() const;
 
   gfx::Rect RootScrollLayerDeviceViewportBounds() const;
 
   LayerImpl* LayerById(int id) const;
@@ skipping 228 matching lines @@
   // there may be 1 or 2 scrollbar layers (for vertical and horizontal). (This
   // is derived from ScrollbarLayerImplBase::scroll_element_id_ and exists to
   // avoid O(n) walks.)
   // TODO(pdr): Refactor this to be more efficient--likely a map where the value
   // is a pair of scrollbar layer ids instead of using a multimap.
   std::multimap<ElementId, int> element_id_to_scrollbar_layer_ids_;
 
   std::vector<PictureLayerImpl*> picture_layers_;
   LayerImplList surface_layers_;
 
-  // List of visible layers for the most recently prepared frame.
-  LayerImplList render_surface_layer_list_;
-  // After drawing the |render_surface_layer_list_| the areas in this region
+  // List of render surfaces for the most recently prepared frame.
+  RenderSurfaceList render_surface_list_;
+  // After drawing the |render_surface_list_| the areas in this region
   // would not be fully covered by opaque content.
   Region unoccluded_screen_space_region_;
 
   bool viewport_size_invalid_;
   bool needs_update_draw_properties_;
 
   // In impl-side painting mode, this is true when the tree may contain
   // structural differences relative to the active tree.
   bool needs_full_tree_sync_;
 
@@ skipping 24 matching lines @@
 
   std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_