Always use the WebFrameWidget when attaching the root graphics

third_party/WebKit/Source/web/WebViewImpl.h

Index: third_party/WebKit/Source/web/WebViewImpl.h
diff --git a/third_party/WebKit/Source/web/WebViewImpl.h b/third_party/WebKit/Source/web/WebViewImpl.h
index 70905512f151dc17ad4376ec6ec27677327c4487..ba7ee97b4f0bc1304988b1692f97ff7aeb1affe0 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.h
+++ b/third_party/WebKit/Source/web/WebViewImpl.h
@@ -425,11 +425,8 @@ public:
     }
 
     GraphicsLayer* rootGraphicsLayer();
-    void setRootGraphicsLayer(GraphicsLayer*);
     PaintLayerCompositor* compositor() const;
     void scheduleAnimation();
-    void attachCompositorAnimationTimeline(CompositorAnimationTimeline*);
-    void detachCompositorAnimationTimeline(CompositorAnimationTimeline*);
     CompositorAnimationTimeline* linkHighlightsTimeline() const { return m_linkHighlightsTimeline.get(); }
 
     WebViewScheduler* scheduler() const override;
@@ -542,6 +539,7 @@ private:
     friend class WebView;  // So WebView::Create can call our constructor
     friend class WTF::RefCounted<WebViewImpl>;
     friend void setCurrentInputEventForTest(const WebInputEvent*);
+    friend class WebViewFrameWidget;
 
     enum DragAction {
       DragEnter,
@@ -617,6 +615,10 @@ private:
 
     float deviceScaleFactor() const;
 
+    void setRootGraphicsLayer(GraphicsLayer*);
+    void attachCompositorAnimationTimeline(CompositorAnimationTimeline*);
+    void detachCompositorAnimationTimeline(CompositorAnimationTimeline*);
+
     WebViewClient* m_client; // Can be 0 (e.g. unittests, shared workers, etc.)
     WebSpellCheckClient* m_spellCheckClient;