[cc] Add window decoration layers (NinePatch)

webkit/compositor_bindings/WebDecorationLayerImpl.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 WebDecorationLayerImpl_h
+#define WebDecorationLayerImpl_h
+
+#include <public/WebDecorationLayer.h>
+#include <wtf/OwnPtr.h>
+
+namespace WebKit {
+
+class WebLayerImpl;
+
+class WebDecorationLayerImpl : public WebDecorationLayer {
+public:
+    WebDecorationLayerImpl();
+    virtual ~WebDecorationLayerImpl();
+
+    // WebDecorationLayer implementation.
+    virtual WebLayer* layer() OVERRIDE;
+
+    virtual void setBitmap(const SkBitmap& bitmap, const WebRect& aperture) OVERRIDE;
+
+private:
+    OwnPtr<WebLayerImpl> m_layer;
+};
+
+} // namespace WebKit
+
+#endif // WebDecorationLayerImpl_h