Move ScrollableArea timer to TaskRunnerTimer.

third_party/WebKit/Source/core/frame/RootFrameViewport.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/RootFrameViewport.h"
 
 #include "core/frame/FrameView.h"
 #include "core/layout/ScrollAlignment.h"
 #include "core/layout/ScrollAnchor.h"
 #include "platform/geometry/DoubleRect.h"
@@ skipping 98 matching lines @@
     return quad;
   FloatQuad viewportQuad =
       m_layoutViewport->localToVisibleContentQuad(quad, localObject, flags);
   if (m_visualViewport) {
     viewportQuad = m_visualViewport->localToVisibleContentQuad(
         viewportQuad, localObject, flags);
   }
   return viewportQuad;
 }
 
+RefPtr<WebTaskRunner> RootFrameViewport::getTimerTaskRunner() const {
+  return layoutViewport().getTimerTaskRunner();
+}
+
 int RootFrameViewport::horizontalScrollbarHeight(
     OverlayScrollbarClipBehavior behavior) const {
   return layoutViewport().horizontalScrollbarHeight(behavior);
 }
 
 int RootFrameViewport::verticalScrollbarWidth(
     OverlayScrollbarClipBehavior behavior) const {
   return layoutViewport().verticalScrollbarWidth(behavior);
 }
 
@@ skipping 325 matching lines @@
   visualViewport().clearScrollableArea();
 }
 
 DEFINE_TRACE(RootFrameViewport) {
   visitor->trace(m_visualViewport);
   visitor->trace(m_layoutViewport);
   ScrollableArea::trace(visitor);
 }
 
 }  // namespace blink