Use the solid color detection to create solid layers

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index 47e74aeefcc247bcc8b9c193fc22de40c83c5fd8..0c2a4bfc1ab96ddb7a4fd40e2085977b73578f10 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -149,6 +149,9 @@ class CC_EXPORT PictureLayerImpl
   virtual bool HasValidTilePriorities() const;
   bool AllTilesRequiredForActivationAreReadyToDraw() const;
 
+  void SetSolidColorState(bool is_solid_color, SkColor solid_color);
+  bool IsSolidColor() const { return is_solid_color_; }
+
  protected:
   friend class LayerRasterTileIterator;
 
@@ -228,6 +231,9 @@ class CC_EXPORT PictureLayerImpl
   gfx::Rect viewport_rect_for_tile_priority_;
   gfx::Transform screen_space_transform_for_tile_priority_;
 
+  bool is_solid_color_;
+  SkColor solid_color_;
+
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };