[cros] Error bubble on login is displayed to the left of Gaia frame.

chrome/browser/resources/chromeos/login/screen_gaia_signin.js

 // 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.
 
 /**
  * @fileoverview Oobe signin screen implementation.
  */
 
 cr.define('login', function() {
 
@@ skipping 242 matching lines @@
       } else if (msg.method == 'loginUILoaded' && this.isAuthExtMessage_(e)) {
         // TODO(altimofeev): there is no guarantee that next 'focusout' event
         // will be caused by the extension, so better approach is direct asking
         // the extension (and gaia consequently) to not grab the focus.
         if (this.silentLoad_ && this.hasFocused_) {
           document.addEventListener(
               'focusout', this.selfBind_(this.onFocusOut_.bind(this)));
         }
         $('error-message').update();
         this.loading = false;
+        // Show deferred error bubble.
+        if (this.errorBubble_) {
+          this.showErrorBubble(this.errorBubble_[0], this.errorBubble_[1]);
+          this.errorBubble_ = undefined;
+        }
         this.clearRetry_();
         chrome.send('loginWebuiReady');
       } else if (msg.method =='offlineLogin' && this.isAuthExtMessage_(e)) {
         this.email = msg.email;
         chrome.send('authenticateUser', [msg.email, msg.password]);
         this.loading = true;
         Oobe.getInstance().headerHidden = true;
       }
     },
 
@@ skipping 80 matching lines @@
       $('guestSignin').innerHTML = localStrings.getStringF(
           'guestSignin',
           '<a id="guestSigninLink" class="signin-link" href="#">',
           '</a>');
       $('createAccountLink').onclick = function() {
         chrome.send('createAccount');
       };
       $('guestSigninLink').onclick = function() {
         chrome.send('launchIncognito');
       };
+    },
+
+    /**
+     * Shows sign-in error bubble.
+     * @param {number} loginAttempts Number of login attemps tried.
+     * @param {HTMLElement} content Content to show in bubble.
+     */
+    showErrorBubble: function(loginAttempts, error) {
+      if (this.isLocal) {
+        $('add-user-button').hidden = true;
+        $('cancel-add-user-button').hidden = false;
+        // Reload offline version of the sign-in extension, which will show
+        // error itself.
+        chrome.send('offlineLogin', [this.email]);
+      } else if (!this.loading) {
+        $('bubble').showContentForElement($('login-box'), error,
+                                          cr.ui.Bubble.Attachment.LEFT);
+      } else {
+        // Defer the bubble until the frame has been loaded.
+        this.errorBubble_ = [loginAttempts, error];
+      }
     }
   };
 
   /**
    * Loads the authentication extension into the iframe.
    * @param {Object} data Extension parameters bag.
    */
   GaiaSigninScreen.loadAuthExtension = function(data) {
     $('gaia-signin').loadAuthExtension_(data);
   };
 
   /**
    * Updates the authentication extension with new parameters, if needed.
    * @param {Object} data New extension parameters bag.
    */
   GaiaSigninScreen.updateAuthExtension = function(data) {
     $('gaia-signin').updateAuthExtension_(data);
   };
 
   return {
     GaiaSigninScreen: GaiaSigninScreen
   };
 });