Bug 845668 Part 0: Remove nsFrameLoader::mChildHost r=jdm

content/base/src/nsFrameLoader.cpp

@@ -2049,8 +2049,6 @@ nsFrameLoader::TryRemoteBrowser()
     nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;
     rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));
     mRemoteBrowser->SetBrowserDOMWindow(browserDOMWin);
-
-    mChildHost = static_cast<ContentParent*>(mRemoteBrowser->Manager());
   }
   return true;
 }

content/base/src/nsFrameLoader.h

@@ -434,7 +434,6 @@ private:
   bool mVisible : 1;
 
   // XXX leaking
-  nsCOMPtr<nsIObserver> mChildHost;
   RenderFrameParent* mCurrentRemoteFrame;
   TabParent* mRemoteBrowser;