Remove m_layerTreeView from WebViewImpl.

sky/engine/web/GraphicsLayerFactoryChromium.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SKY_ENGINE_WEB_GRAPHICSLAYERFACTORYCHROMIUM_H_
 #define SKY_ENGINE_WEB_GRAPHICSLAYERFACTORYCHROMIUM_H_
 
 #include "sky/engine/platform/graphics/GraphicsLayerFactory.h"
 
 namespace blink {
-class WebViewImpl;
 
 class GraphicsLayerFactoryChromium final : public GraphicsLayerFactory {
 public:
-    explicit GraphicsLayerFactoryChromium(WebViewImpl*);
-
+    explicit GraphicsLayerFactoryChromium();
     virtual ~GraphicsLayerFactoryChromium();
-
     virtual PassOwnPtr<GraphicsLayer> createGraphicsLayer(GraphicsLayerClient*) override;
-
-private:
-    // The owner of this GraphicsLayerFactoryChromium.
-    WebViewImpl* m_webView;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_WEB_GRAPHICSLAYERFACTORYCHROMIUM_H_