Bindings for CSSOM View smooth scroll API

Source/platform/scroll/ScrollableArea.cpp

 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
  * Copyright (C) 2008, 2011 Apple 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.
@@ skipping 170 matching lines @@
     if (verticalScrollbar) {
         verticalScrollbar->offsetDidChange();
         if (verticalScrollbar->isOverlayScrollbar() && !hasLayerForVerticalScrollbar())
             verticalScrollbar->invalidate();
     }
 
     if (scrollPosition() != oldPosition)
         scrollAnimator()->notifyContentAreaScrolled(scrollPosition() - oldPosition);
 }
 
+bool ScrollableArea::scrollBehaviorFromString(const String& behaviorString, ScrollBehavior& behavior)
+{
+    if (behaviorString == "auto")
+        behavior = ScrollBehaviorAuto;
+    else if (behaviorString == "instant")
+        behavior = ScrollBehaviorInstant;
+    else if (behaviorString == "smooth")
+        behavior = ScrollBehaviorSmooth;
+    else
+        return false;
+
+    return true;
+}
+
 bool ScrollableArea::handleWheelEvent(const PlatformWheelEvent& wheelEvent)
 {
     return scrollAnimator()->handleWheelEvent(wheelEvent);
 }
 
 // NOTE: Only called from Internals for testing.
 void ScrollableArea::setScrollOffsetFromInternals(const IntPoint& offset)
 {
     setScrollOffsetFromAnimation(offset);
 }
@@ skipping 199 matching lines @@
 {
     return scrollSize(orientation);
 }
 
 float ScrollableArea::pixelStep(ScrollbarOrientation) const
 {
     return 1;
 }
 
 } // namespace WebCore