Backing out fix for bug 419452 per bug 420059. a=beltzner

content/xul/document/src/nsXULDocument.cpp

@@ -2992,7 +2992,6 @@ nsXULDocument::ResumeWalk()
         if (! count)
             break;
 
-        nsCOMPtr<nsIURI> overlayURI = mCurrentPrototype->GetURI();
         nsCOMPtr<nsIURI> uri = mUnloadedOverlays[count-1];
         mUnloadedOverlays.RemoveObjectAt(count-1);
 
@@ -3006,21 +3005,8 @@ nsXULDocument::ResumeWalk()
             continue;
         if (NS_FAILED(rv))
             return rv;
-        if (shouldReturn) {
-            if (mOverlayLoadObservers.IsInitialized()) {
-                nsIObserver *obs = mOverlayLoadObservers.GetWeak(overlayURI);
-                if (obs) {
-                    // This overlay has an unloaded overlay, so it will never
-                    // notify. The best we can do is to notify for the unloaded
-                    // overlay instead, assuming nobody is already notifiable
-                    // for it. Note that this will confuse the observer.
-                    if (!mOverlayLoadObservers.GetWeak(uri))
-                        mOverlayLoadObservers.Put(uri, obs);
-                    mOverlayLoadObservers.Remove(overlayURI);
-                }
-            }
+        if (shouldReturn)
             return NS_OK;
-        }
     }
 
     // If we get here, there is nothing left for us to walk. The content