cc: Move more functionality from host to LayerTreeImpl

cc/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_LAYER_TREE_IMPL_H_
 #define CC_LAYER_TREE_IMPL_H_
 
 #include "base/hash_tables.h"
 #include "cc/layer_impl.h"
 
@@ skipping 76 matching lines @@
   const LayerImpl* root_scroll_layer() const { return root_scroll_layer_; }
   void set_root_scroll_layer(LayerImpl* layer_impl) { root_scroll_layer_ = layer_impl; }
 
   LayerImpl* currently_scrolling_layer() { return currently_scrolling_layer_; }
   void set_currently_scrolling_layer(LayerImpl* layer_impl) { currently_scrolling_layer_ = layer_impl; }
 
   void ClearCurrentlyScrollingLayer();
 
   void UpdateMaxScrollOffset();
 
+  SkColor background_color() const { return background_color_; }
+  void set_background_color(SkColor color) { background_color_ = color; }
+
+  bool has_transparent_background() const { return has_transparent_background_; }

[danakj, 2013/01/04 22:14:29]

80 cols

+  void set_has_transparent_background(bool transparent) {
+    has_transparent_background_ = transparent;
+  }
+
   // Updates draw properties and render surface layer list
   void UpdateDrawProperties();
 
   void ClearRenderSurfaces();
 
   const LayerList& RenderSurfaceLayerList() const;
 
   gfx::Size ContentSize() const;
 
   LayerImpl* LayerById(int id);
 
   // These should be called by LayerImpl's ctor/dtor.
   void RegisterLayer(LayerImpl* layer);
   void UnregisterLayer(LayerImpl* layer);
 
   AnimationRegistrar* animationRegistrar() const;
 
 protected:
   LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl);
 
   LayerTreeHostImpl* layer_tree_host_impl_;
   int source_frame_number_;
   scoped_ptr<LayerImpl> root_layer_;
   HeadsUpDisplayLayerImpl* hud_layer_;
   LayerImpl* root_scroll_layer_;
   LayerImpl* currently_scrolling_layer_;
+  SkColor background_color_;
+  bool has_transparent_background_;
 
   typedef base::hash_map<int, LayerImpl*> LayerIdMap;
   LayerIdMap layer_id_map_;
 
   // Persisted state
   int scrolling_layer_id_from_previous_tree_;
 
   // List of visible layers for the most recently prepared frame. Used for
   // rendering and input event hit testing.
   LayerList render_surface_layer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }
 
 #endif  // CC_LAYER_TREE_IMPL_H_