Insert pinch zoom virtual viewport layers to graphics layer tree.

Source/WebKit/chromium/src/PinchViewports.h

Index: Source/WebKit/chromium/src/PinchViewports.h
diff --git a/public/webpage/WebUserGestureToken.h b/Source/WebKit/chromium/src/PinchViewports.h
similarity index 58%
copy from public/webpage/WebUserGestureToken.h
copy to Source/WebKit/chromium/src/PinchViewports.h
index 9506ef962e2617d3d1fb0c66e9cecb79eddef062..c8ded15c5e22f66c394069d1cd637e0ef16d68af 100644
--- a/public/webpage/WebUserGestureToken.h
+++ b/Source/WebKit/chromium/src/PinchViewports.h
@@ -28,46 +28,53 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebUserGestureToken_h
-#define WebUserGestureToken_h
+#ifndef PinchViewports_h
+#define PinchViewports_h
 
-#include "../platform/WebPrivatePtr.h"
+#include "public/platform/WebScrollbar.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace WebCore {
-class UserGestureToken;
+class GraphicsLayer;
 }
 
 namespace WebKit {
 
-// A WebUserGestureToken allows for storing the user gesture state of the
-// currently active context and reinstantiating it later on to continue
-// processing the user gesture in case it was not consumed meanwhile.
-class WebUserGestureToken {
+class WebScrollbarLayer;
+class WebViewImpl;
+
+using namespace WebCore;
+
+class PinchViewports {
 public:
-    WebUserGestureToken() { }
-    WebUserGestureToken(const WebUserGestureToken& other) { assign(other); }
-    WebUserGestureToken& operator=(const WebUserGestureToken& other)
-    {
-        assign(other);
-        return *this;
-    }
-    ~WebUserGestureToken() { reset(); }
+    static WTF::PassOwnPtr<PinchViewports> create(WebViewImpl* owner);
+    ~PinchViewports();
+
+    void setViewportSizes();
+    void clearLayers();
+    void insertViewportLayers();
+    void detachViewportLayers();
+    void reparentScrollbars();
+    void showGraphicsLayers();
 
-    WEBKIT_EXPORT bool hasGestures() const;
-    bool isNull() const { return m_token.isNull(); }
+protected:
+    const static size_t kOverlayScrollbarThickness;
 
-#if WEBKIT_IMPLEMENTATION
-    explicit WebUserGestureToken(PassRefPtr<WebCore::UserGestureToken>);
-    operator PassRefPtr<WebCore::UserGestureToken>() const;
-#endif
+    PinchViewports(WebViewImpl* owner);
 
-private:
-    WEBKIT_EXPORT void assign(const WebUserGestureToken&);
-    WEBKIT_EXPORT void reset();
+    void setupScrollbar(WebKit::WebScrollbar::Orientation);
 
-    WebPrivatePtr<WebCore::UserGestureToken> m_token;
+    WebViewImpl* m_owner;
+    WTF::OwnPtr<GraphicsLayer> m_innerViewportClipLayer;
+    WTF::OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;
+    WTF::OwnPtr<GraphicsLayer> m_pageScaleLayer;
+    WTF::OwnPtr<GraphicsLayer> m_overlayScrollbarHorizontal;
+    WTF::OwnPtr<GraphicsLayer> m_overlayScrollbarVertical;
+    WTF::OwnPtr<WebScrollbarLayer> m_webScrollbarLayerHorizontal;
+    WTF::OwnPtr<WebScrollbarLayer> m_webScrollbarLayerVertical;
 };
 
 } // namespace WebKit
 
-#endif // WebUserGestureToken_h
+#endif // PinchViewports_h