Enable Scroll Animation for RenderLayerScrollableArea

Source/core/rendering/RenderLayerScrollableArea.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 31 matching lines @@
  */
 
 #include "config.h"
 #include "core/rendering/RenderLayer.h"
 
 #include "core/css/PseudoStyleRequest.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderScrollbar.h"
 #include "core/rendering/RenderScrollbarPart.h"
 #include "core/rendering/RenderView.h"
@@ skipping 407 matching lines @@
 IntSize RenderLayerScrollableArea::overhangAmount() const
 {
     return IntSize();
 }
 
 IntPoint RenderLayerScrollableArea::lastKnownMousePosition() const
 {
     return m_box->frame() ? m_box->frame()->eventHandler().lastKnownMousePosition() : IntPoint();
 }
 
+bool RenderLayerScrollableArea::scrollAnimatorEnabled() const
+{
+    return m_box->frame()->settings() && m_box->frame()->settings()->scrollAnimatorEnabled();
+}
+
+bool RenderLayerScrollableArea::scheduleAnimation()
+{
+    if (HostWindow* window = m_box->frameView()->hostWindow()) {
+        window->scheduleAnimation();
+        return true;
+    }
+    return false;
+}
+
 bool RenderLayerScrollableArea::shouldSuspendScrollAnimations() const
 {
     RenderView* view = m_box->view();
     if (!view)
         return true;
     return view->frameView()->shouldSuspendScrollAnimations();
 }
 
 bool RenderLayerScrollableArea::scrollbarsCanBeActive() const
 {
@@ skipping 1016 matching lines @@
 void RenderLayerScrollableArea::setForceNeedsCompositedScrolling(ForceNeedsCompositedScrollingMode mode)
 {
     if (m_forceNeedsCompositedScrolling == mode)
         return;
 
     m_forceNeedsCompositedScrolling = mode;
     layer()->didUpdateNeedsCompositedScrolling();
 }
 
 } // Namespace WebCore