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

chrome/browser/chromeos/input_method/mock_input_method_manager.h

Index: chrome/browser/chromeos/input_method/mock_input_method_manager.h
diff --git a/chrome/browser/chromeos/input_method/mock_input_method_manager.h b/chrome/browser/chromeos/input_method/mock_input_method_manager.h
index 3a41db1b2778312f2ea50304dd47d614741936d0..20852c418d6d042669fe7d31402c290481dac004 100644
--- a/chrome/browser/chromeos/input_method/mock_input_method_manager.h
+++ b/chrome/browser/chromeos/input_method/mock_input_method_manager.h
@@ -76,9 +76,13 @@ class MockInputMethodManager : public InputMethodManager {
   void AddObserver(InputMethodManager::Observer* observer) override;
   void AddCandidateWindowObserver(
       InputMethodManager::CandidateWindowObserver* observer) override;
+  void AddImeMenuObserver(
+      InputMethodManager::ImeMenuObserver* observer) override;
   void RemoveObserver(InputMethodManager::Observer* observer) override;
   void RemoveCandidateWindowObserver(
       InputMethodManager::CandidateWindowObserver* observer) override;
+  void RemoveImeMenuObserver(
+      InputMethodManager::ImeMenuObserver* observer) override;
   scoped_ptr<InputMethodDescriptors> GetSupportedInputMethods() const override;
   void ActivateInputMethodMenuItem(const std::string& key) override;
   bool IsISOLevel5ShiftUsedByCurrentInputMethod() const override;
@@ -92,6 +96,8 @@ class MockInputMethodManager : public InputMethodManager {
       Profile* profile) override;
   scoped_refptr<InputMethodManager::State> GetActiveIMEState() override;
   void SetState(scoped_refptr<InputMethodManager::State> state) override;
+  void ImeMenuActivated() override;
+  void ImeMenuDeactivated() override;
 
   // Sets an input method ID which will be returned by GetCurrentInputMethod().
   void SetCurrentInputMethodId(const std::string& input_method_id);