[PUSH] Fix lifetime of the hasPermission callback in layout Tests.

The promise needs to be created before calling the client for
layout tests to work, it does not seem to be an issue in real code.

BUG=401424

Review URL: https://codereview.chromium.org/709733003

git-svn-id: svn://svn.chromium.org/blink/trunk@185049 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/modules/push_messaging/PushManager.cpp

@@ -83,8 +83,9 @@ ScriptPromise PushManager::hasPermission(ScriptState* scriptState)
 
     RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
 
+    ScriptPromise promise = resolver->promise();
     client->getPermissionStatus(new PushPermissionStatusCallback(resolver), serviceWorkerProvider);
-    return resolver->promise();
+    return promise;
 }
 
 void PushManager::doRegister(WebPushClient* client, PassRefPtr<ScriptPromiseResolver> resolver, WebServiceWorkerProvider* serviceWorkerProvider)