cc: Move more functionality from host to LayerTreeImpl

cc/layer_tree_impl.h

Index: cc/layer_tree_impl.h
diff --git a/cc/layer_tree_impl.h b/cc/layer_tree_impl.h
index 8d65030e13965991d35e2e232baa560e548a2dc2..64a259ba52d2b808a9edb1e6d96fbc8bd954d923 100644
--- a/cc/layer_tree_impl.h
+++ b/cc/layer_tree_impl.h
@@ -94,6 +94,14 @@ class CC_EXPORT LayerTreeImpl {
 
   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();
 
@@ -120,6 +128,8 @@ protected:
   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_;