Do not allow creating dummy notifier id from production, for safety.

chrome/browser/notifications/login_state_notification_blocker_chromeos_unittest.cc

 // Copyright 2013 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 "ash/shell.h"
 #include "ash/system/system_notifier.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
 #include "chrome/browser/notifications/login_state_notification_blocker_chromeos.h"
 #include "chromeos/login/login_state.h"
@@ skipping 44 matching lines @@
 
  private:
   int state_changed_count_;
   scoped_ptr<message_center::NotificationBlocker> blocker_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginStateNotificationBlockerChromeOSTest);
 };
 
 TEST_F(LoginStateNotificationBlockerChromeOSTest, BaseTest) {
   // Default status: OOBE.
-  message_center::NotifierId notifier_id;
+  message_center::NotifierId notifier_id(
+      message_center::NotifierId::APPLICATION, "test-notifier");
   EXPECT_FALSE(ShouldShowNotificationAsPopup(notifier_id));
 
   // Login screen.
   chromeos::LoginState::Get()->SetLoggedInState(
       chromeos::LoginState::LOGGED_IN_NONE,
       chromeos::LoginState::LOGGED_IN_USER_NONE);
   EXPECT_EQ(1, GetStateChangedCountAndReset());
   EXPECT_FALSE(ShouldShowNotificationAsPopup(notifier_id));
 
   // Logged in as a normal user.
@@ skipping 40 matching lines @@
   // Lock.
   ash::Shell::GetInstance()->OnLockStateChanged(true);
   EXPECT_EQ(1, GetStateChangedCountAndReset());
   EXPECT_TRUE(ShouldShowNotificationAsPopup(notifier_id));
 
   // Unlock.
   ash::Shell::GetInstance()->OnLockStateChanged(false);
   EXPECT_EQ(1, GetStateChangedCountAndReset());
   EXPECT_TRUE(ShouldShowNotificationAsPopup(notifier_id));
 }