Support for auth code based authentication flow for both app and web UI driven flow.

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() {
   // Gaia loading time after which error message must be displayed and
@@ skipping 297 matching lines @@
       var msg = e.data;
       console.log('GaiaSigninScreen.onMessage_: method=' + msg.method);
 
       if (msg.method == 'completeLogin') {
         chrome.send('completeLogin', [msg.email, msg.password]);
         this.loading = true;
         // Now that we're in logged in state header should be hidden.
         Oobe.getInstance().headerHidden = true;
         // Clear any error messages that were shown before login.
         Oobe.clearErrors();
+      } else if (msg.method == 'completeAuthentication') {
+        chrome.send('completeAuthentication', [msg.email,
+                                               msg.password,
+                                               msg.authCode]);
+        this.loading = true;
+        // Now that we're in logged in state header should be hidden.
+        Oobe.getInstance().headerHidden = true;
+        // Clear any error messages that were shown before login.
+        Oobe.clearErrors();
       } else if (msg.method == 'loginUILoaded') {
         this.loading = false;
         chrome.send('loginScreenUpdate');
         this.clearLoadingTimer_();
         // Show deferred error bubble.
         if (this.errorBubble_) {
           this.showErrorBubble(this.errorBubble_[0], this.errorBubble_[1]);
           this.errorBubble_ = undefined;
         }
         chrome.send('loginWebuiReady');
@@ skipping 152 matching lines @@
     // Check current network state if currentScreen is a Gaia signin.
     var currentScreen = Oobe.getInstance().currentScreen;
     if (currentScreen.id == SCREEN_GAIA_SIGNIN)
       chrome.send('showGaiaFrameError', [error]);
   };
 
   return {
     GaiaSigninScreen: GaiaSigninScreen
   };
 });