cc: Remove EnsureRenderSurfaceLayerList, do UpdateDrawProps when needed.

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 <list>
 #include <string>
 #include <vector>
@@ skipping 149 matching lines @@
   float page_scale_factor() const { return page_scale_factor_; }
   float min_page_scale_factor() const { return min_page_scale_factor_; }
   float max_page_scale_factor() const { return max_page_scale_factor_; }
   float page_scale_delta() const  { return page_scale_delta_; }
   void set_sent_page_scale_delta(float delta) {
     sent_page_scale_delta_ = delta;
   }
   float sent_page_scale_delta() const { return sent_page_scale_delta_; }
 
   // Updates draw properties and render surface layer list, as well as tile
-  // priorities.
-  void UpdateDrawProperties();
+  // priorities. Returns false if it was unable to update.
+  bool UpdateDrawProperties();
 
   void set_needs_update_draw_properties() {
     needs_update_draw_properties_ = true;
   }
   bool needs_update_draw_properties() const {
     return needs_update_draw_properties_;
   }
 
   void set_needs_full_tree_sync(bool needs) { needs_full_tree_sync_ = needs; }
   bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
@@ skipping 132 matching lines @@
 
   int render_surface_layer_list_id_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_