Move ScrollableArea timer to TaskRunnerTimer.

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.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@gmail.com>
@@ skipping 30 matching lines @@
  * If you do not delete the provisions above, a recipient may use your
  * version of this file under any of the LGPL, the MPL or the GPL.
  */
 
 #include "core/paint/PaintLayerScrollableArea.h"
 
 #include "core/css/PseudoStyleRequest.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/Node.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/PageScaleConstraintsSet.h"
 #include "core/frame/RootFrameViewport.h"
 #include "core/frame/Settings.h"
 #include "core/frame/VisualViewport.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ skipping 814 matching lines @@
     const FloatQuad& quad,
     const LayoutObject* localObject,
     MapCoordinatesFlags flags) const {
   LayoutBox* box = layoutBox();
   if (!box)
     return quad;
   DCHECK(localObject);
   return localObject->localToAncestorQuad(quad, box, flags);
 }
 
+RefPtr<WebTaskRunner> PaintLayerScrollableArea::getTimerTaskRunner() const {
+  return TaskRunnerHelper::get(TaskType::UnspecedTimer, box().frame());
+}
+
 ScrollBehavior PaintLayerScrollableArea::scrollBehaviorStyle() const {
   return box().style()->getScrollBehavior();
 }
 
 bool PaintLayerScrollableArea::hasHorizontalOverflow() const {
   // TODO(szager): Make the algorithm for adding/subtracting overflow:auto
   // scrollbars memoryless (crbug.com/625300).  This clientWidth hack will
   // prevent the spurious horizontal scrollbar, but it can cause a converse
   // problem: it can leave a sliver of horizontal overflow hidden behind the
   // vertical scrollbar without creating a horizontal scrollbar.  This
@@ skipping 1210 matching lines @@
 
 void PaintLayerScrollableArea::DelayScrollOffsetClampScope::
     clampScrollableAreas() {
   for (auto& scrollableArea : *s_needsClamp)
     scrollableArea->clampScrollOffsetAfterOverflowChange();
   delete s_needsClamp;
   s_needsClamp = nullptr;
 }
 
 }  // namespace blink