[Signin Error Dialog] (3/3) Added the triggering code

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

 // 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.
 
 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 141 matching lines @@
 #include "chrome/browser/ui/webui/chromeos/emulator/device_emulator_ui.h"
 #endif
 
 #if !defined(OS_CHROMEOS)
 #include "chrome/browser/ui/webui/app_launcher_page_ui.h"
 #endif
 
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 #include "chrome/browser/ui/sync/sync_promo_ui.h"
 #include "chrome/browser/ui/webui/signin/inline_login_ui.h"
+#include "chrome/browser/ui/webui/signin/signin_error_ui.h"
 #include "chrome/browser/ui/webui/signin/sync_confirmation_ui.h"
 #include "chrome/browser/ui/webui/signin/user_manager_ui.h"
 #include "chrome/browser/ui/webui/welcome_ui.h"
 #endif
 
 #if defined(OS_WIN)
 #include "chrome/browser/ui/webui/conflicts_ui.h"
 #include "chrome/browser/ui/webui/set_as_default_browser_ui_win.h"
 #endif
 
@@ skipping 366 matching lines @@
   if (url.host() == chrome::kChromeUIInspectHost)
     return &NewWebUI<InspectUI>;
 #endif
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
   if (url.host() == chrome::kChromeUIChromeSigninHost)
     return &NewWebUI<InlineLoginUI>;
   if (url.host() == chrome::kChromeUIUserManagerHost)
     return &NewWebUI<UserManagerUI>;
   if (url.host() == chrome::kChromeUIMdUserManagerHost)
     return &NewWebUI<MDUserManagerUI>;
+  if (url.host() == chrome::kChromeUISigninErrorHost)
+    return &NewWebUI<SigninErrorUI>;
   if (url.host() == chrome::kChromeUISyncConfirmationHost)
     return &NewWebUI<SyncConfirmationUI>;
   if (url.host() == chrome::kChromeUIProfileSigninConfirmationHost)
     return &NewWebUI<ProfileSigninConfirmationUI>;
   if (url.host() == chrome::kChromeUIWelcomeHost)
     return &NewWebUI<WelcomeUI>;
 #endif
 
   /****************************************************************************
    * Other #defines and special logics.
@@ skipping 268 matching lines @@
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }