Keeps the opt-in IME menu in lock screen.

chrome/browser/chromeos/input_method/mock_input_method_manager.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/mock_input_method_manager.h"
 
 #include <utility>
 
 namespace chromeos {
 namespace input_method {
@@ skipping 234 matching lines @@
 void MockInputMethodManager::SetCurrentInputMethodId(
     const std::string& input_method_id) {
   state_->current_input_method_id = input_method_id;
 }
 
 void MockInputMethodManager::ImeMenuActivationChanged(bool is_active) {}
 
 void MockInputMethodManager::NotifyImeMenuItemsChanged(
     const std::string& engine_id,
     const std::vector<InputMethodManager::MenuItem>& items) {}
+
+void MockInputMethodManager::MaybeNotifyImeMenuActivationChanged() {}
+
 }  // namespace input_method
 }  // namespace chromeos