change gaia endpoint by shortcut ctrl-shift-alt-w

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.
  */
 
 login.createScreen('GaiaSigninScreen', 'gaia-signin', function() {
   // Gaia loading time after which error message must be displayed and
@@ skipping 271 matching lines @@
       var params = {};
       for (var i in cr.login.GaiaAuthHost.SUPPORTED_PARAMS) {
         var name = cr.login.GaiaAuthHost.SUPPORTED_PARAMS[i];
         if (data[name])
           params[name] = data[name];
       }
 
       if (data.localizedStrings)
         params.localizedStrings = data.localizedStrings;
 
+      if (this.isWebviewSignin) {
+        data.useEmbedded = false;
+        params.gaiaPath = 'ChromeOsEmbeddedSetup';
+      }
+
       if (data.useEmbedded)
         params.gaiaPath = 'EmbeddedSignIn';
 
       if (data.forceReload ||
           JSON.stringify(this.gaiaAuthParams_) != JSON.stringify(params)) {
         this.error_ = 0;
 
         var authMode = cr.login.GaiaAuthHost.AuthMode.DEFAULT;
         if (data.useOffline)
           authMode = cr.login.GaiaAuthHost.AuthMode.OFFLINE;
@@ skipping 368 matching lines @@
      * For more info see C++ class 'WebUILoginView' which calls this method.
      * @param {number} error Error code.
      * @param {string} url The URL that failed to load.
      */
     onFrameError: function(error, url) {
       this.error_ = error;
       chrome.send('frameLoadingCompleted', [this.error_]);
     },
   };
 });