Made root translation layer the root when using pinch virtual viewport.

Source/core/frame/PinchViewport.h

Index: Source/core/frame/PinchViewport.h
diff --git a/Source/core/frame/PinchViewport.h b/Source/core/frame/PinchViewport.h
index 3565dafce63376422446c811876ca2368050938f..0c814fdcb4a628d2f3ea17bd8a18adb7420ae06a 100644
--- a/Source/core/frame/PinchViewport.h
+++ b/Source/core/frame/PinchViewport.h
@@ -69,7 +69,12 @@ public:
     void attachToLayerTree(GraphicsLayer*, GraphicsLayerFactory*);
     GraphicsLayer* rootGraphicsLayer()
     {
-        return m_innerViewportContainerLayer.get();
+        return m_rootTransformLayer.get();
+    }
+
+    GraphicsLayer* rootTransformLayer()
+    {
+        return m_rootTransformLayer.get();

[Ian Vollick, 2014/06/04 13:22:12]

why two accessors for the same value?

[bokan, 2014/06/04 15:12:26]

You're right, this is overly verbose. Removed.

     }
 
     // Sets the location of the inner viewport relative to the outer viewport. The
@@ -132,6 +137,7 @@ private:
     LocalFrame* mainFrame() const;
 
     FrameHost& m_frameHost;
+    OwnPtr<GraphicsLayer> m_rootTransformLayer;
     OwnPtr<GraphicsLayer> m_innerViewportContainerLayer;
     OwnPtr<GraphicsLayer> m_pageScaleLayer;
     OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;