Revert of Revert of Inline sign in extracts gaia id from HTTP header and seeds account tracker

chrome/browser/resources/gaia_auth/success.js

Index: chrome/browser/resources/gaia_auth/success.js
diff --git a/chrome/browser/resources/gaia_auth/success.js b/chrome/browser/resources/gaia_auth/success.js
deleted file mode 100644
index 54ed7fac614cb744125d07c20d37e0ccdd70da78..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/gaia_auth/success.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-function load() {
-  var params = getUrlSearchParams(location.search);
-  var msg = {
-    'method': 'confirmLogin',
-    'attemptToken': params['attemptToken']
-  };
-  window.parent.postMessage(msg,
-          'chrome-extension://mfffpogegjflfpflabcdkioaeobkgjik/main.html');
-}
-
-document.addEventListener('DOMContentLoaded', load);
-