Send takeover msg from MT to CC using the animation path.

third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp

Index: third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp
diff --git a/third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp b/third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp
index 0e0c1b8ea7b96bbf9a65a00ea1242e83a73ccbbf..d90b5d92ff2a1bcc24f531732f5494a320672ee3 100644
--- a/third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp
+++ b/third_party/WebKit/Source/platform/animation/CompositorAnimationHost.cpp
@@ -16,14 +16,20 @@ bool CompositorAnimationHost::isNull() const
     return !m_animationHost;
 }
 
-void CompositorAnimationHost::updateImplOnlyScrollOffsetAnimation(const gfx::Vector2dF& adjustment, cc::ElementId elementId)
+void CompositorAnimationHost::adjustImplOnlyScrollOffsetAnimation(cc::ElementId elementId, const gfx::Vector2dF& adjustment)
 {
     if (!m_animationHost)
         return;
 
-    cc::ScrollOffsetAnimationUpdate update(cc::ScrollOffsetAnimationUpdate::Type::SCROLL_OFFSET_CHANGED, elementId);
-    update.adjustment_ = adjustment;
-    m_animationHost->scroll_offset_animations().AddUpdate(update);
+    m_animationHost->scroll_offset_animations().AddAdjustmentUpdate(elementId, adjustment);
+}
+
+void CompositorAnimationHost::takeoverImplOnlyScrollOffsetAnimation(cc::ElementId elementId)
+{
+    if (!m_animationHost)
+        return;
+
+    m_animationHost->scroll_offset_animations().AddTakeoverUpdate(elementId);
 }
 
 } // namespace blink