Communicate MT changes to impl-only scroll offset animations

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 249 matching lines @@
         m_runState = RunState::RunningOnCompositor;
         m_compositorAnimationId = animationId;
         m_compositorAnimationGroupId = animationGroupId;
     }
 
     return sentToCompositor;
 }
 
 void ScrollAnimator::updateCompositorAnimations()
 {
+    ScrollAnimatorCompositorCoordinator::updateCompositorAnimations();
     if (m_runState == RunState::PostAnimationCleanup) {
         postAnimationCleanupAndReset();
         return;
     }
 
     if (m_compositorAnimationId && m_runState != RunState::RunningOnCompositor
         && m_runState != RunState::RunningOnCompositorButNeedsUpdate
         && m_runState != RunState::WaitingToCancelOnCompositorButNewScroll) {
         // If the current run state is WaitingToSendToCompositor but we have a
         // non-zero compositor animation id, there's a currently running
@@ skipping 146 matching lines @@
     }
     return true;
 }
 
 DEFINE_TRACE(ScrollAnimator)
 {
     ScrollAnimatorBase::trace(visitor);
 }
 
 } // namespace blink