Use embedded sign in UI for inline sign in flow

chrome/browser/resources/gaia_auth_host/gaia_auth_host.js

 // Copyright 2013 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 An UI component to host gaia auth extension in an iframe.
  * After the component binds with an iframe, call its {@code load} to start the
  * authentication flow. There are two events would be raised after this point:
  * a 'ready' event when the authentication UI is ready to use and a 'completed'
  * event when the authentication is completed successfully. If caller is
@@ skipping 36 matching lines @@
   var GAIA_ORIGIN = 'https://accounts.google.com';
 
   /**
    * Supported params of auth extension. For a complete list, check out the
    * auth extension's main.js.
    * @type {!Array.<string>}
    * @const
    */
   var SUPPORTED_PARAMS = [
     'gaiaUrl',       // Gaia url to use;
+    'gaiaPath',      // Gaia path to use without a leading slash;
     'hl',            // Language code for the user interface;
     'email',         // Pre-fill the email field in Gaia UI;
     'service',       // Name of Gaia service;
     'continueUrl',   // Continue url to use;
     'partitionId'    // Partition ID for the embedded Gaia webview;
   ];
 
   /**
    * Supported localized strings. For a complete list, check out the auth
    * extension's offline.js
@@ skipping 299 matching lines @@
   };
 
   GaiaAuthHost.SUPPORTED_PARAMS = SUPPORTED_PARAMS;
   GaiaAuthHost.LOCALIZED_STRING_PARAMS = LOCALIZED_STRING_PARAMS;
   GaiaAuthHost.AuthMode = AuthMode;
 
   return {
     GaiaAuthHost: GaiaAuthHost
   };
 });