Rename paint data structures

cc/input/scrollbar.h

Index: cc/input/scrollbar.h
diff --git a/cc/input/scrollbar.h b/cc/input/scrollbar.h
index 3f2239bf2b3eb1d1803711dd0725ac568379097d..69fbd3262bcb83d08b5d2cdc84492fa645dcb6a9 100644
--- a/cc/input/scrollbar.h
+++ b/cc/input/scrollbar.h
@@ -6,11 +6,10 @@
 #define CC_INPUT_SCROLLBAR_H_
 
 #include "cc/base/cc_export.h"
+#include "cc/paint/paint_canvas.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 
-class SkCanvas;
-
 namespace cc {
 
 enum ScrollbarOrientation { HORIZONTAL, VERTICAL };
@@ -33,7 +32,7 @@ class Scrollbar {
   virtual gfx::Rect TrackRect() const = 0;
   virtual float ThumbOpacity() const = 0;
   virtual bool NeedsPaintPart(ScrollbarPart part) const = 0;
-  virtual void PaintPart(SkCanvas* canvas,
+  virtual void PaintPart(PaintCanvas* canvas,
                          ScrollbarPart part,
                          const gfx::Rect& content_rect) = 0;
 };