(Chrome OS) Notify when the candidate window is opened/closed.

chrome/browser/chromeos/input_method/candidate_window_view.h

Index: chrome/browser/chromeos/input_method/candidate_window_view.h
diff --git a/chrome/browser/chromeos/input_method/candidate_window_view.h b/chrome/browser/chromeos/input_method/candidate_window_view.h
index 06e3120ce7ffb5f45307dd735668099764c15a8f..b5570eeb96478997408dbde48e3fa0a4f6bda3ac 100644
--- a/chrome/browser/chromeos/input_method/candidate_window_view.h
+++ b/chrome/browser/chromeos/input_method/candidate_window_view.h
@@ -26,6 +26,9 @@ class CandidateWindowView : public views::View {
     // See comments at NotifyCandidateClicked() in chromeos_input_method_ui.h
     // for details about the parameters.
     virtual void OnCandidateCommitted(int index, int button, int flag) = 0;
+
+    virtual void OnCandidateWindowOpened() = 0;
+    virtual void OnCandidateWindowClosed() = 0;
   };
 
   explicit CandidateWindowView(views::Widget* parent_frame);
@@ -137,6 +140,8 @@ class CandidateWindowView : public views::View {
   // Returns the appropriate area (header or footer) to put auxiliary texts.
   InformationTextArea* GetAuxiliaryTextArea();
 
+  bool IsCandidateWindowOpen() const;
+
   // The lookup table (candidates).
   InputMethodLookupTable lookup_table_;