Added chrome switch that lets tests override URL path, moved GAIA auth extension from CrOS

chrome/browser/resources/gaia_auth/offline.js

Index: chrome/browser/resources/gaia_auth/offline.js
diff --git a/chrome/browser/resources/gaia_auth/offline.js b/chrome/browser/resources/gaia_auth/offline.js
new file mode 100644
index 0000000000000000000000000000000000000000..8fe08f6333f22e3b29c2cb764ac63cbcd874d3b0
--- /dev/null
+++ b/chrome/browser/resources/gaia_auth/offline.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Offline login implementation.
+ */
+
+function load() {
+  var params = getUrlSearchParams(location.search);
+
+  // Setup localized strings.
+  var signInTitle = $('sign-in-title');
+  var emailLabel = $('email-label');
+  var passwordLabel = $('password-label');
+  var submitButton = $('submit-button');
+  var errorSpan = $('errormsg-alert');
+
+  signInTitle.textContent = decodeURIComponent(params['stringSignIn']);
+  emailLabel.textContent = decodeURIComponent(params['stringEmail']);
+  passwordLabel.textContent = decodeURIComponent(params['stringPassword']);
+  submitButton.value = decodeURIComponent(params['stringSignIn']);
+  errorSpan.textContent = decodeURIComponent(params['stringError']);
+
+  // Setup actions.
+  var form = $('offline-login-form');
+  form.addEventListener('submit', function(e) {
+    var msg = {
+      'method': 'offlineLogin',
+      'email': form.email.value,
+      'password': form.password.value
+    };
+    window.parent.postMessage(msg, 'chrome://oobe/');
+    e.preventDefault();
+  });
+
+  var email = params['email'];
+  if (email) {
+    // Email is present, which means that unsuccessful login attempt has been
+    // made. Try to mimic Gaia's behaviour.
+    form.email.value = email;
+    form.password.classList.add('form-error');
+    form.password.focus();
+  } else {
+    form.email.focus();
+  }
+  window.parent.postMessage({'method': 'loginUILoaded'}, 'chrome://oobe/');
+}
+
+document.addEventListener('DOMContentLoaded', load);