Communicate MT changes to impl-only scroll offset animations

third_party/WebKit/Source/core/layout/ScrollAnchor.cpp

Index: third_party/WebKit/Source/core/layout/ScrollAnchor.cpp
diff --git a/third_party/WebKit/Source/core/layout/ScrollAnchor.cpp b/third_party/WebKit/Source/core/layout/ScrollAnchor.cpp
index 2d805f19d6f25979023b1f490169cb57cc4a0e4d..f045d2a4725d90b096a033ac794318520fbe492e 100644
--- a/third_party/WebKit/Source/core/layout/ScrollAnchor.cpp
+++ b/third_party/WebKit/Source/core/layout/ScrollAnchor.cpp
@@ -188,6 +188,7 @@ void ScrollAnchor::restore()
             m_scroller->setScrollPosition(
                 m_scroller->scrollPositionDouble() + DoubleSize(adjustment),
                 AnchoringScroll);
+            animator->updateImplOnlyAnimationWithAdjustment(FloatSize(adjustment));
         } else {
             // If in the middle of a scroll animation, stop the animation, make
             // the adjustment, and continue the animation on the pending delta.