Plumb CompositedDisplayList to WebViewImpl

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 85d2741d0bf2fb862c8b970e8c7b0404972180a0..c56f30f4afd3817740282e75a070c7f70bf87ec4 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -271,6 +271,9 @@ public:
     void setShowScrollBottleneckRects(bool) override;
     void acceptLanguagesChanged() override;
 
+    void setCompositedDisplayList(WebCompositedDisplayList*) override;
+    WebCompositedDisplayList* compositedDisplayList() override;
+
     // WebViewImpl
     void enableViewport();
     void disableViewport();
@@ -740,6 +743,8 @@ private:
     bool m_recreatingGraphicsContext;
     static const WebInputEvent* m_currentInputEvent;
 
+    OwnPtr<WebCompositedDisplayList> m_compositedDisplayList;

[jbroman, 2015/08/19 18:33:50]

Nit: we could consider making WebCompositedDisplayList a member of WebViewImpl,
since it is itself already basically an OwnPtr<CompositedDisplayList>
internally. Then you'd forward the PassOwnPtr<CompositedDisplayList> all the way
into WebViewImpl, where you would do
m_compositedDisplayList.assign(passCompositedDisplayList) or similar.

i.e. here:
    WebCompositedDisplayList m_compositedDisplayList;
in the impl:
    void WebViewImpl::setCompositedDisplayList(PassOwnPtr<CompositedDisplayList>
compositedDisplayList)
    {
        m_compositedDisplayList.assign(compositedDisplayList);
    }
    WebCompositedDisplayList* WebViewImpl::compositedDisplayList() { return
&m_compositedDisplayList; }

I don't feel very strongly about this instance, though.

[pdr., 2015/08/20 04:01:55]

This worked out nicely since it moves the WebCDL <-> CDL logic up a bit and out
of Page.

+
     MediaKeysClientImpl m_mediaKeysClientImpl;
     OwnPtr<WebActiveGestureAnimation> m_gestureAnimation;
     WebPoint m_positionOnFlingStart;