Compositor Animation Timelines: Fix frame swapping tests in WebFrameTest.cpp

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index 93970bcf2568715ff4ad554638446abf373f1a35..2e5cc0ebb1dfeeced3206b4484c12a2a76628d95 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -2686,8 +2686,8 @@ void WebViewImpl::willCloseLayerTreeView()
         m_linkHighlightsTimeline.clear();
     }
 
-    if (page())
-        page()->willCloseLayerTreeView();
+    if (page() && m_layerTreeView)
+        page()->willCloseLayerTreeView(*m_layerTreeView);
 
     setRootGraphicsLayer(nullptr);
     m_layerTreeView = nullptr;
@@ -4238,6 +4238,8 @@ void WebViewImpl::initializeLayerTreeView()
         devTools->layerTreeViewChanged(m_layerTreeView);
 
     m_page->settings().setAcceleratedCompositingEnabled(m_layerTreeView);
+    if (m_layerTreeView)
+        m_page->layerTreeViewInitialized(*m_layerTreeView);
 
     // FIXME: only unittests, click to play, Android printing, and printing (for headers and footers)
     // make this assert necessary. We should make them not hit this code and then delete allowsBrokenNullLayerTreeView.