Make IsSolidColor() a property on CC scrollbar layers.

cc/layers/scrollbar_layer_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_LAYERS_SCROLLBAR_LAYER_IMPL_H_
 #define CC_LAYERS_SCROLLBAR_LAYER_IMPL_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/input/scrollbar.h"
 #include "cc/layers/layer_impl.h"
 
 namespace cc {
 
 class LayerTreeImpl;
 class ScrollView;
 
 class CC_EXPORT ScrollbarLayerImpl : public LayerImpl {
  public:
   static scoped_ptr<ScrollbarLayerImpl> Create(
       LayerTreeImpl* tree_impl,
       int id,
-      ScrollbarOrientation orientation);
+      ScrollbarOrientation orientation,
+      bool is_solid_color);
   virtual ~ScrollbarLayerImpl();
 
   // LayerImpl implementation.
   virtual ScrollbarLayerImpl* ToScrollbarLayer() OVERRIDE;
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
       OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
 
   virtual bool WillDraw(DrawMode draw_mode,
                         ResourceProvider* resource_provider) OVERRIDE;
   virtual void AppendQuads(QuadSink* quad_sink,
                            AppendQuadsData* append_quads_data) OVERRIDE;
 
   virtual void DidLoseOutputSurface() OVERRIDE;
 
   int scroll_layer_id() const { return scroll_layer_id_; }
   void set_scroll_layer_id(int id) { scroll_layer_id_ = id; }
 
   ScrollbarOrientation Orientation() const;
+  bool IsSolidColor() const;
+  void set_is_solid_color(bool is_solid_color);
   float CurrentPos() const;
   int Maximum() const;
 
   void set_thumb_thickness(int thumb_thickness) {
     thumb_thickness_ = thumb_thickness;
   }
   void set_thumb_length(int thumb_length) {
     thumb_length_ = thumb_length;
   }
   void set_track_start(int track_start) {
@@ skipping 16 matching lines @@
   }
 
   void SetCurrentPos(float current_pos) { current_pos_ = current_pos; }
   void SetMaximum(int maximum) { maximum_ = maximum; }
 
   gfx::Rect ComputeThumbQuadRect() const;
 
  protected:
   ScrollbarLayerImpl(LayerTreeImpl* tree_impl,
                      int id,
-                     ScrollbarOrientation orientation);
+                     ScrollbarOrientation orientation,
+                     bool is_solid_color);
 
  private:
   virtual const char* LayerTypeAsString() const OVERRIDE;
 
   gfx::Rect ScrollbarLayerRectToContentRect(gfx::RectF layer_rect) const;
 
   ResourceProvider::ResourceId track_resource_id_;
   ResourceProvider::ResourceId thumb_resource_id_;
 
   float current_pos_;
@@ skipping 10 matching lines @@
 
   float visible_to_total_length_ratio_;
 
   int scroll_layer_id_;
 
   bool is_scrollable_area_active_;
   bool is_scroll_view_scrollbar_;
   bool enabled_;
   bool is_custom_scrollbar_;
   bool is_overlay_scrollbar_;
+  bool is_solid_color_;
 
   DISALLOW_COPY_AND_ASSIGN(ScrollbarLayerImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_SCROLLBAR_LAYER_IMPL_H_