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

third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h

Index: third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
diff --git a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
index 6e3921c480226e68bf523c712ba3fec7ccfc376e..d18201e25fd0635fab79008a56d4735fa9825bfd 100644
--- a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
+++ b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.h
@@ -49,6 +49,7 @@ class Page;
 class Region;
 class ScrollableArea;
 class WebCompositorAnimationTimeline;
+class WebLayerTreeView;
 
 class CORE_EXPORT ScrollingCoordinator final : public NoBaseWillBeGarbageCollectedFinalized<ScrollingCoordinator> {
     WTF_MAKE_NONCOPYABLE(ScrollingCoordinator);
@@ -59,7 +60,9 @@ public:
     ~ScrollingCoordinator();
     DECLARE_TRACE();
 
-    void willCloseLayerTreeView();
+    void layerTreeViewInitialized(WebLayerTreeView&);
+    void willCloseLayerTreeView(WebLayerTreeView&);
+
     void willBeDestroyed();
 
     // Return whether this scrolling coordinator handles scrolling for the given frame view.
@@ -156,9 +159,6 @@ private:
 
     bool frameViewIsDirty() const;
 
-    void createProgrammaticScrollAnimatorTimeline();
-    void destroyProgrammaticScrollAnimatorTimeline();
-
     OwnPtr<WebCompositorAnimationTimeline> m_programmaticScrollAnimatorTimeline;
 
     using ScrollbarMap = WillBeHeapHashMap<RawPtrWillBeMember<ScrollableArea>, OwnPtr<WebScrollbarLayer>>;