Add a basic demo mode browser test.

chrome/browser/chromeos/login/authenticator.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_AUTHENTICATOR_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_AUTHENTICATOR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 40 matching lines @@
   virtual void LoginRetailMode() = 0;
 
   // Initiates incognito ("browse without signing in") login.
   virtual void LoginOffTheRecord() = 0;
 
   // Initiates login into the public account identified by |username|.
   virtual void LoginAsPublicAccount(const std::string& username) = 0;
 
   // Initiates login into kiosk mode account identified by |app_user_id|.
   // The |app_user_id| is a generated username for the account.
-  // |force_ephemeral| specifies whether to force the session to be ephemeral.
-  virtual void LoginAsKioskAccount(
-      const std::string& app_user_id, bool force_ephemeral) = 0;
+  // |force_guest| specifies whether to force the session to use a guest mount.

[bartfab (slow), 2014/03/25 12:52:54]

Nit: Specify what happens when this is |false|.

[rkc, 2014/03/26 21:30:40]

Done.

+  virtual void LoginAsKioskAccount(const std::string& app_user_id,
+                                   bool force_guest) = 0;
 
   // Completes retail mode login.
   virtual void OnRetailModeLoginSuccess() = 0;
 
   // Notifies caller that login was successful. Must be called on the UI thread.
   virtual void OnLoginSuccess() = 0;
 
   // Must be called on the UI thread.
   virtual void OnLoginFailure(const LoginFailure& error) = 0;
 
@@ skipping 26 matching lines @@
 
  private:
   friend class base::RefCountedThreadSafe<Authenticator>;
 
   DISALLOW_COPY_AND_ASSIGN(Authenticator);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_AUTHENTICATOR_H_