Don't destroy RenderWidgetCompositor during DoDeferredClose

cc/test/fake_proxy.h

Index: cc/test/fake_proxy.h
diff --git a/cc/test/fake_proxy.h b/cc/test/fake_proxy.h
index 27cd72cab558ebaeeb5e28e08ca3d61fd3cf9a54..d023ae154b2c9b6fd37060ff995cd90187368230 100644
--- a/cc/test/fake_proxy.h
+++ b/cc/test/fake_proxy.h
@@ -24,6 +24,7 @@ class FakeProxy : public Proxy {
   virtual void FinishAllRendering() OVERRIDE {}
   virtual bool IsStarted() const OVERRIDE;
   virtual void SetLayerTreeHostClientReady() OVERRIDE {}
+  virtual void SetLayerTreeHostClientFinished() OVERRIDE {}
   virtual void SetVisible(bool visible) OVERRIDE {}
   virtual const RendererCapabilities& GetRendererCapabilities() const OVERRIDE;
   virtual void SetNeedsAnimate() OVERRIDE {}