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

webkit/compositor_bindings/web_to_ccscrollbar_theme_painter_adapter.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 WEBKIT_COMPOSITOR_BINDINGS_WEB_TO_CCSCROLLBAR_THEME_PAINTER_ADAPTER_H_
+#define WEBKIT_COMPOSITOR_BINDINGS_WEB_TO_CCSCROLLBAR_THEME_PAINTER_ADAPTER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/scrollbar_theme_painter.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebScrollbarThemePainter.h"

[enne (OOO), 2012/12/17 20:48:55]

Is it possible to not pollute the header with this type, so that cc doesn't need
to transitively include things from the platform API? I think you can just make
a scoped_ptr<WebScrollbarThemePainter> member and forward declare it.

[danakj, 2012/12/17 21:45:09]

Done.

+
+namespace WebKit {
+
+class WebToCCScrollbarThemePainterAdapter : public cc::ScrollbarThemePainter {
+ public:
+  static scoped_ptr<WebToCCScrollbarThemePainterAdapter> Create(
+      const WebScrollbarThemePainter& webPainter) {
+    return make_scoped_ptr(new WebToCCScrollbarThemePainterAdapter(webPainter));
+  }
+
+  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;
+
+ private:
+  WebToCCScrollbarThemePainterAdapter(
+      const WebScrollbarThemePainter& webPainter)
+      : m_painter(webPainter) {}
+
+  WebScrollbarThemePainter m_painter;
+};
+
+}  // namespace WebKit
+
+#endif  // WEBKIT_COMPOSITOR_BINDINGS_WEB_TO_CCSCROLLBAR_THEME_PAINTER_ADAPTER_H_