Give OOPIF FrameViews their own scroll animation timelines and hosts

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index 4f686427e736d2b74b9d810e5e813d769d90a867..c0e69a2d0a71697b45fc3edcefb24b9db2f28d79 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -651,8 +651,10 @@ bool WebFrameWidgetImpl::isAcceleratedCompositingActive() const {
 }
 
 void WebFrameWidgetImpl::willCloseLayerTreeView() {
-  if (m_layerTreeView)
-    page()->willCloseLayerTreeView(*m_layerTreeView);
+  if (m_layerTreeView) {
+    page()->willCloseLayerTreeView(*m_layerTreeView,
+                                   m_localRoot->frame()->view());
+  }
 
   setIsAcceleratedCompositingActive(false);
   m_mutator = nullptr;
@@ -996,8 +998,10 @@ void WebFrameWidgetImpl::initializeLayerTreeView() {
     devTools->layerTreeViewChanged(m_layerTreeView);
 
   page()->settings().setAcceleratedCompositingEnabled(m_layerTreeView);
-  if (m_layerTreeView)
-    page()->layerTreeViewInitialized(*m_layerTreeView);
+  if (m_layerTreeView) {
+    page()->layerTreeViewInitialized(*m_layerTreeView,
+                                     m_localRoot->frame()->view());
+  }
 
   // FIXME: only unittests, click to play, Android priting, and printing (for
   // headers and footers) make this assert necessary. We should make them not