Add scroll units in GestureEvents.

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 552 matching lines @@
     const double deltaX = scrollState.deltaX();
     const double deltaY = scrollState.deltaY();
     bool scrolled = false;
 
     if (deltaY || deltaX)
         document().updateLayoutIgnorePendingStylesheets();
 
     // Handle the scrollingElement separately, as it scrolls the viewport.
     if (this == document().scrollingElement()) {
         FloatSize delta(deltaX, deltaY);
-        if (document().frame()->applyScrollDelta(delta, scrollState.isBeginning()).didScroll()) {
+        if (document().frame()->applyScrollDelta(ScrollByPrecisePixel, delta, scrollState.isBeginning()).didScroll()) {
             scrolled = true;
             scrollState.consumeDeltaNative(scrollState.deltaX(), scrollState.deltaY());
         }
     } else {
         if (!layoutObject())
             return;
         LayoutBox* curBox = layoutObject()->enclosingBox();
         // FIXME: Native scrollers should only consume the scroll they
         // apply. See crbug.com/457765.
         if (deltaX && curBox->scroll(ScrollLeft, ScrollByPrecisePixel, deltaX).didScroll) {
@@ skipping 3036 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink