Adjust DOMWindow properties to emulate old style pinch semantics

Source/core/frame/PinchViewport.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 181 matching lines @@
 
     FloatPoint clampedOffset(clampOffsetToBoundaries(location));
 
     if (clampedOffset != m_offset) {
         m_offset = clampedOffset;
 
         ScrollingCoordinator* coordinator = frameHost().page().scrollingCoordinator();
         ASSERT(coordinator);
         coordinator->scrollableAreaScrollLayerDidChange(this);
 
+        Document* document = mainFrame()->document();
+        document->enqueueScrollEventForNode(document);
+
         valuesChanged = true;
     }
 
     if (!valuesChanged)
         return;
 
     mainFrame()->loader().saveScrollState();
 
     clampToBoundaries();
 }
@@ skipping 306 matching lines @@
     } else if (graphicsLayer == m_rootTransformLayer) {
         name =  "Root Transform Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink