Refactor cc scrollbar layers to separate solid-color vs desktop.

cc/layers/solid_color_scrollbar_layer_impl.h

Index: cc/layers/solid_color_scrollbar_layer_impl.h
diff --git a/cc/layers/solid_color_scrollbar_layer_impl.h b/cc/layers/solid_color_scrollbar_layer_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..c952fc2d4c2a127d555e3d708266c5a4456fdc77
--- /dev/null
+++ b/cc/layers/solid_color_scrollbar_layer_impl.h
@@ -0,0 +1,50 @@
+// Copyright 2013 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_SOLID_COLOR_SCROLLBAR_LAYER_IMPL_H_
+#define CC_LAYERS_SOLID_COLOR_SCROLLBAR_LAYER_IMPL_H_
+
+#include "cc/base/cc_export.h"
+#include "cc/layers/scrollbar_layer_impl_base.h"
+
+namespace cc {
+
+class CC_EXPORT SolidColorScrollbarLayerImpl : public ScrollbarLayerImplBase {
+ public:
+  static scoped_ptr<SolidColorScrollbarLayerImpl> Create(
+      LayerTreeImpl* tree_impl,
+      int id,
+      ScrollbarOrientation orientation,
+      int thumb_thickness);
+  virtual ~SolidColorScrollbarLayerImpl();
+
+  // LayerImpl overrides.
+  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
+      OVERRIDE;
+  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
+
+  virtual void AppendQuads(QuadSink* quad_sink,
+                           AppendQuadsData* append_quads_data) OVERRIDE;
+
+
+ protected:
+  SolidColorScrollbarLayerImpl(LayerTreeImpl* tree_impl,
+                               int id,
+                               ScrollbarOrientation orientation,
+                               int thumb_thickness);
+
+  // ScrollbarLayerImplBase implementation.
+  virtual int ThumbThickness() const OVERRIDE;
+  virtual int ThumbLength() const OVERRIDE;
+  virtual float TrackLength() const OVERRIDE;
+  virtual int TrackStart() const OVERRIDE;
+
+ private:
+  int thumb_thickness_;
+  SkColor color_;
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_SOLID_COLOR_SCROLLBAR_LAYER_IMPL_H_