Add "kiosk_only" manifest attribute for platform apps.

chrome/browser/chromeos/login/fake_user_manager.h

Index: chrome/browser/chromeos/login/fake_user_manager.h
diff --git a/chrome/browser/chromeos/login/fake_user_manager.h b/chrome/browser/chromeos/login/fake_user_manager.h
index a74f820f2462053f1c5f109f4f28e82d436fcf05..f8399a94fdc6d3f9496de97591c522800544ec9d 100644
--- a/chrome/browser/chromeos/login/fake_user_manager.h
+++ b/chrome/browser/chromeos/login/fake_user_manager.h
@@ -24,8 +24,11 @@ class FakeUserManager : public UserManager {
   // Create and add a new user.
   void AddUser(const std::string& email);
 
-  // Calculates the user name hash and calls UserLoggedIn to login a user.
-  void LoginUser(const std::string& email);
+  // Create and add a kiosk app user.
+  void AddKioskAppUser(const std::string& kiosk_app_username);
+
+   // Calculates the user name hash and calls UserLoggedIn to login a user.
+   void LoginUser(const std::string& email);
 
   // UserManager overrides.
   virtual const UserList& GetUsers() const OVERRIDE;
@@ -134,6 +137,9 @@ class FakeUserManager : public UserManager {
   }
 
  private:
+  // We use this internal function for const-correctness.
+  User* GetActiveUserInternal() const;
+
   UserList user_list_;
   UserList logged_in_users_;
   std::string owner_email_;