Remove some dead scrolling paths and unused params

Source/web/WebPagePopupImpl.cpp

Index: Source/web/WebPagePopupImpl.cpp
diff --git a/Source/web/WebPagePopupImpl.cpp b/Source/web/WebPagePopupImpl.cpp
index 37cc1ebc63fdb3ac37faa735567058f830c04a06..5742de3d83e8dc52e30928c82f2104f14226f6c7 100644
--- a/Source/web/WebPagePopupImpl.cpp
+++ b/Source/web/WebPagePopupImpl.cpp
@@ -97,11 +97,6 @@ private:
         m_popup->widgetClient()->didInvalidateRect(paintRect);
     }
 
-    virtual void scroll(const IntSize& scrollDelta, const IntRect& scrollRect, const IntRect& clipRect) OVERRIDE
-    {
-        m_popup->widgetClient()->didScrollRect(scrollDelta.width(), scrollDelta.height(), intersection(scrollRect, clipRect));
-    }
-
     virtual void invalidateContentsForSlowScroll(const IntRect& updateRect) OVERRIDE
     {
         invalidateContentsAndRootView(updateRect);