Add chrome.inputMethodPrivate.onImeMenuActivationChanged API.

ui/base/ime/chromeos/input_method_manager.h

 // 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.
 
 #ifndef UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_
 #define UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 51 matching lines @@
   // keyboard is used, since it controls its own candidate window.
   class CandidateWindowObserver {
    public:
     virtual ~CandidateWindowObserver() {}
     // Called when the candidate window is opened.
     virtual void CandidateWindowOpened(InputMethodManager* manager) = 0;
     // Called when the candidate window is closed.
     virtual void CandidateWindowClosed(InputMethodManager* manager) = 0;
   };
 
+  // ImeMenuObserver is notified of events related to the IME menu on the shelf
+  // bar.
+  class ImeMenuObserver {
+   public:
+    virtual ~ImeMenuObserver() {}
+    // Called when the IME menu is activated or deactivated.
+    virtual void ImeMenuActivationChanged(bool activation) = 0;

[Devlin, 2016/01/13 18:11:27]

nit: |activation| is also a weird name here because it doesn't clearly state
what the value will be in each scenario.  If this is whether or not the menu is
active when this method is called, call it "is_active".

[Azure Wei, 2016/01/14 09:38:26]

Done.

+  };
+
   class State : public base::RefCounted<InputMethodManager::State> {
    public:
     // Returns a copy of state.
     virtual scoped_refptr<State> Clone() const = 0;
 
     // Adds an input method extension. This function does not takes ownership of
     // |instance|.
     virtual void AddInputMethodExtension(
         const std::string& extension_id,
         const InputMethodDescriptors& descriptors,
@@ skipping 114 matching lines @@
   static UI_BASE_IME_EXPORT void Shutdown();
 
   // Get the current UI session state (e.g. login screen, lock screen, etc.).
   virtual UISessionState GetUISessionState() = 0;
 
   // Adds an observer to receive notifications of input method related
   // changes as desribed in the Observer class above.
   virtual void AddObserver(Observer* observer) = 0;
   virtual void AddCandidateWindowObserver(
       CandidateWindowObserver* observer) = 0;
+  virtual void AddImeMenuObserver(ImeMenuObserver* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
   virtual void RemoveCandidateWindowObserver(
       CandidateWindowObserver* observer) = 0;
+  virtual void RemoveImeMenuObserver(ImeMenuObserver* observer) = 0;
 
   // Returns all input methods that are supported, including ones not active.
   // This function never returns NULL. Note that input method extensions are NOT
   // included in the result.
   virtual scoped_ptr<InputMethodDescriptors>
       GetSupportedInputMethods() const = 0;
 
   // Activates the input method property specified by the |key|.
   virtual void ActivateInputMethodMenuItem(const std::string& key) = 0;
 
@@ skipping 19 matching lines @@
       std::vector<std::string>* input_method_ids) = 0;
 
   // Returns new empty state for the |profile|.
   virtual scoped_refptr<State> CreateNewState(Profile* profile) = 0;
 
   // Returns active state.
   virtual scoped_refptr<InputMethodManager::State> GetActiveIMEState() = 0;
 
   // Replaces active state.
   virtual void SetState(scoped_refptr<State> state) = 0;
+
+  // Activates or deactivates the IME Menu.
+  virtual void ImeMenuActivationChanged(bool activation) = 0;

[Devlin, 2016/01/13 18:11:27]

ditto

[Azure Wei, 2016/01/14 09:38:26]

Done.

 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // UI_BASE_IME_CHROMEOS_INPUT_METHOD_MANAGER_H_