Remove content::NotificationObserver dependency from most Prefs code.

chrome/browser/chromeos/input_method/browser_state_monitor_unittest.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/chromeos/input_method/browser_state_monitor.h"
 
 #include "chrome/browser/api/prefs/pref_member.h"
 #include "chrome/browser/chromeos/input_method/mock_input_method_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
@@ skipping 219 matching lines @@
   EXPECT_EQ(InputMethodManager::STATE_TERMINATING,
             mock_manager.last_state_);
   EXPECT_EQ(InputMethodManager::STATE_TERMINATING, monitor.state());
 
   // In the terminating state, the monitor should ignore input method changes.
   monitor.InputMethodChanged(&mock_manager, false);
   EXPECT_EQ(0, monitor.update_local_state_count());
   EXPECT_EQ(0, monitor.update_user_pref_count());
 }
 
-TEST(BrowserStateMonitorTest, TestObservePrefChanged) {
-  TestingPrefService prefs;
-  RegisterTestPrefs(&prefs);
-  MockInputMethodManager mock_manager;
-  TestableBrowserStateMonitor monitor(&mock_manager);
-  monitor.SetPrefServiceForTesting(&prefs);
-
-  EXPECT_EQ(1, mock_manager.set_state_count_);
-  monitor.Observe(chrome::NOTIFICATION_PREF_CHANGED,
-                  content::NotificationService::AllSources(),
-                  content::NotificationService::NoDetails());
-
-  // NOTIFICATION_PREF_CHANGED should be ignored.
-  EXPECT_EQ(1, mock_manager.set_state_count_);
-}
-
 TEST(BrowserStateMonitorTest, TestUpdatePrefOnLoginScreen) {
   TestingPrefService prefs;
   RegisterTestPrefs(&prefs);
   MockInputMethodManager mock_manager;
   TestableBrowserStateMonitor monitor(&mock_manager);
   monitor.SetPrefServiceForTesting(&prefs);
 
   EXPECT_EQ(InputMethodManager::STATE_LOGIN_SCREEN, monitor.state());
   monitor.InputMethodChanged(&mock_manager, false);
   EXPECT_EQ(1, monitor.update_local_state_count());
@@ skipping 117 matching lines @@
   monitor.InputMethodChanged(&mock_manager, false);
   EXPECT_EQ(0, monitor.update_local_state_count());
   EXPECT_EQ(5, monitor.update_user_pref_count());
   EXPECT_EQ(input_method_id_3, monitor.last_user_pref());
   EXPECT_EQ(input_method_id_2, previous.GetValue());
   EXPECT_EQ(input_method_id_3, current.GetValue());
 }
 
 }  // namespace input_method
 }  // namespace chromeos