Fix ScrollAnimator::hasRunningAnimation to account for the PostAnimationCleanup

third_party/WebKit/Source/platform/scroll/ScrollAnimator.cpp

 /*
  * Copyright (c) 2011, Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 64 matching lines @@
 FloatPoint ScrollAnimator::desiredTargetPosition() const
 {
     if (m_runState == RunState::WaitingToCancelOnCompositor)
         return currentPosition();
     return (m_animationCurve || m_runState == RunState::WaitingToSendToCompositor)
         ? m_targetOffset : currentPosition();
 }
 
 bool ScrollAnimator::hasRunningAnimation() const
 {
-    return (m_animationCurve || m_runState == RunState::WaitingToSendToCompositor);
+    return m_runState != RunState::PostAnimationCleanup
+        && (m_animationCurve || m_runState == RunState::WaitingToSendToCompositor);
 }
 
 FloatSize ScrollAnimator::computeDeltaToConsume(const FloatSize& delta) const
 {
     FloatPoint pos = desiredTargetPosition();
     FloatPoint newPos = toFloatPoint(m_scrollableArea->clampScrollPosition(pos + delta));
     return newPos - pos;
 }
 
 void ScrollAnimator::resetAnimationState()
@@ skipping 362 matching lines @@
     }
     return true;
 }
 
 DEFINE_TRACE(ScrollAnimator)
 {
     ScrollAnimatorBase::trace(visitor);
 }
 
 } // namespace blink