cc: Create a cc::ScrollbarThemePainter and an adapter class in compositor bindings.

cc/test/fake_scrollbar_theme_painter.h

Index: cc/test/fake_scrollbar_theme_painter.h
diff --git a/cc/test/fake_scrollbar_theme_painter.h b/cc/test/fake_scrollbar_theme_painter.h
new file mode 100644
index 0000000000000000000000000000000000000000..61c8dd38a950649c31a9b1465be867ca918b860b
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+++ b/cc/test/fake_scrollbar_theme_painter.h
@@ -0,0 +1,59 @@
+// 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_TEST_FAKE_SCROLLBAR_THEME_PAINTER_H_
+#define CC_TEST_FAKE_SCROLLBAR_THEME_PAINTER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/scrollbar_theme_painter.h"
+#include "third_party/skia/include/core/SkColor.h"
+
+namespace cc {
+
+class FakeScrollbarThemePainter : public ScrollbarThemePainter {
+ public:
+  static scoped_ptr<FakeScrollbarThemePainter> Create(bool paint) {
+    return make_scoped_ptr(new FakeScrollbarThemePainter(paint));
+  }
+  virtual ~FakeScrollbarThemePainter() {}
+
+  virtual void PaintScrollbarBackground(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintTrackBackground(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintBackTrackPart(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintForwardTrackPart(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintBackButtonStart(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintBackButtonEnd(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintForwardButtonStart(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintForwardButtonEnd(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintTickmarks(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+  virtual void PaintThumb(SkCanvas* canvas, const gfx::Rect& rect)
+      OVERRIDE;
+
+  void set_paint(bool paint) { paint_ = paint; }
+
+ private:
+  explicit FakeScrollbarThemePainter(bool paint)
+      : paint_(paint),
+        fill_color_(0) {}
+
+  void Paint(SkCanvas* canvas, gfx::Rect rect);
+
+  bool paint_;
+  SkColor fill_color_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeScrollbarThemePainter);
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_SCROLLBAR_BACKGROUND_PAINTER_H_