Back out bug 1173467 (changesets a20799ebf48c, 9312c5cb756e, c0e8bba17067, af075443ab21, 30cefdf8d020) for assertion failures in test_app_protocol.html.

dom/workers/ServiceWorkerScriptCache.cpp

@@ -54,14 +54,9 @@ CreateCacheStorage(nsIPrincipal* aPrincipal, ErrorResult& aRv,
     sandbox.forget(aHolder);
   }
 
-  // We assume private browsing is not enabled here.  The ScriptLoader
-  // explicitly fails for private browsing so there should never be
-  // a service worker running in private browsing mode.  Therefore if
-  // we are purging scripts or running a comparison algorithm we cannot
-  // be in private browing.
   return CacheStorage::CreateOnMainThread(cache::CHROME_ONLY_NAMESPACE,
-                                          sandboxGlobalObject, aPrincipal,
-                                          false /* private browsing */, aRv);
+                                          sandboxGlobalObject,
+                                          aPrincipal, aRv);
 }
 
 class CompareManager;