Add chrome.inputMethodPrivate.onImeMenuActivationChanged API.

ui/base/ime/chromeos/input_method_manager.h

Index: ui/base/ime/chromeos/input_method_manager.h
diff --git a/ui/base/ime/chromeos/input_method_manager.h b/ui/base/ime/chromeos/input_method_manager.h
index 2f7012331af4c78d1263a3080b4008c6d8749efc..339bf8132efdde33685e823296b3ba797de0ab92 100644
--- a/ui/base/ime/chromeos/input_method_manager.h
+++ b/ui/base/ime/chromeos/input_method_manager.h
@@ -69,6 +69,15 @@ class UI_BASE_IME_EXPORT InputMethodManager {
     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() {}

[stevenjb, 2016/01/20 18:33:43]

blank line

[Azure Wei, 2016/01/21 10:25:07]

Done.

+    // Called when the IME menu is activated or deactivated.
+    virtual void ImeMenuActivationChanged(bool is_active) = 0;

[stevenjb, 2016/01/20 18:33:43]

private:
 DISALLOW_ASSIGN(...)

[Azure Wei, 2016/01/21 10:25:07]

Done.

+  };
+
   class State : public base::RefCounted<InputMethodManager::State> {
    public:
     // Returns a copy of state.
@@ -203,9 +212,11 @@ class UI_BASE_IME_EXPORT InputMethodManager {
   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
@@ -245,6 +256,9 @@ class UI_BASE_IME_EXPORT InputMethodManager {
 
   // Replaces active state.
   virtual void SetState(scoped_refptr<State> state) = 0;
+
+  // Activates or deactivates the IME Menu.
+  virtual void ImeMenuActivationChanged(bool is_active) = 0;
 };
 
 }  // namespace input_method