Implement CSSOM Smooth Scroll API

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1398 matching lines @@
     if (!isCurrentlyDisplayedInFrame())
         return;
 
     document()->updateLayoutIgnorePendingStylesheets();
 
     FrameView* view = m_frame->view();
     if (!view)
         return;
 
     IntSize scaledOffset(x * m_frame->pageZoomFactor(), y * m_frame->pageZoomFactor());
-    // FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
-    view->scrollBy(scaledOffset);
+    view->scrollBy(scaledOffset, scrollBehavior);
 }
 
 void DOMWindow::scrollTo(int x, int y, const Dictionary& scrollOptions, ExceptionState& exceptionState) const
 {
     ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
     if (RuntimeEnabledFeatures::cssomSmoothScrollEnabled() && !scrollBehaviorFromScrollOptions(scrollOptions, scrollBehavior, exceptionState))
         return;
 
     if (!isCurrentlyDisplayedInFrame())
         return;
 
     document()->updateLayoutIgnorePendingStylesheets();
 
     RefPtr<FrameView> view = m_frame->view();
     if (!view)
         return;
 
     IntPoint layoutPos(x * m_frame->pageZoomFactor(), y * m_frame->pageZoomFactor());
-    // FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
-    view->setScrollPosition(layoutPos);
+    view->setScrollPosition(layoutPos, scrollBehavior);
 }
 
 void DOMWindow::moveBy(float x, float y) const
 {
     if (!m_frame || !m_frame->isMainFrame())
         return;
 
     FrameHost* host = m_frame->host();
     if (!host)
         return;
@@ skipping 439 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<DOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore