Add an option in language settings for activating the IME menu.

chrome/browser/chromeos/input_method/input_method_manager_impl.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/input_method_manager_impl.h"
 
 #include <algorithm>  // std::find
 
 #include <sstream>
 
@@ skipping 871 matching lines @@
 void InputMethodManagerImpl::AddObserver(
     InputMethodManager::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void InputMethodManagerImpl::AddCandidateWindowObserver(
     InputMethodManager::CandidateWindowObserver* observer) {
   candidate_window_observers_.AddObserver(observer);
 }
 
+void InputMethodManagerImpl::AddImeMenuObserver(
+    InputMethodManager::ImeMenuObserver* observer) {
+  ime_menu_observers_.AddObserver(observer);

[Shu Chen, 2015/12/28 16:41:47]

pls put this behind a flag.

+}
+
 void InputMethodManagerImpl::RemoveObserver(
     InputMethodManager::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void InputMethodManagerImpl::RemoveCandidateWindowObserver(
     InputMethodManager::CandidateWindowObserver* observer) {
   candidate_window_observers_.RemoveObserver(observer);
 }
 
+void InputMethodManagerImpl::RemoveImeMenuObserver(
+    InputMethodManager::ImeMenuObserver* observer) {
+  ime_menu_observers_.RemoveObserver(observer);
+}
+
 InputMethodManager::UISessionState InputMethodManagerImpl::GetUISessionState() {
   return ui_session_;
 }
 
 void InputMethodManagerImpl::SetUISessionState(UISessionState new_ui_session) {
   ui_session_ = new_ui_session;
   switch (ui_session_) {
     case STATE_LOGIN_SCREEN:
       break;
     case STATE_BROWSER_SCREEN:
@@ skipping 234 matching lines @@
                     candidate_window_observers_,
                     CandidateWindowOpened(this));
 }
 
 void InputMethodManagerImpl::CandidateWindowClosed() {
   FOR_EACH_OBSERVER(InputMethodManager::CandidateWindowObserver,
                     candidate_window_observers_,
                     CandidateWindowClosed(this));
 }
 
+void InputMethodManagerImpl::ImeMenuActivated() {
+  FOR_EACH_OBSERVER(InputMethodManager::ImeMenuObserver, ime_menu_observers_,
+                    ImeMenuActivated(this));
+}
+
+void InputMethodManagerImpl::ImeMenuDeactivated() {
+  FOR_EACH_OBSERVER(InputMethodManager::ImeMenuObserver, ime_menu_observers_,
+                    ImeMenuDeactivated(this));
+}
+
 void InputMethodManagerImpl::MaybeInitializeCandidateWindowController() {
   if (candidate_window_controller_.get())
     return;
 
   candidate_window_controller_.reset(
       CandidateWindowController::CreateCandidateWindowController());
   candidate_window_controller_->AddObserver(this);
 }
 
 }  // namespace input_method
 }  // namespace chromeos