[FYI] All-in-one OnCandidateWindow{Show,Update,Hide}

ui/views/controls/textfield/native_textfield_views.h

Index: ui/views/controls/textfield/native_textfield_views.h
diff --git a/ui/views/controls/textfield/native_textfield_views.h b/ui/views/controls/textfield/native_textfield_views.h
index aad8dad8275be8faf865437d8e86c8686c5a745f..c841ab4faa449947b2c7dc0d28d0289bd6299b8a 100644
--- a/ui/views/controls/textfield/native_textfield_views.h
+++ b/ui/views/controls/textfield/native_textfield_views.h
@@ -198,6 +198,9 @@ class VIEWS_EXPORT NativeTextfieldViews : public View,
       base::i18n::TextDirection direction) OVERRIDE;
   virtual void ExtendSelectionAndDelete(size_t before, size_t after) OVERRIDE;
   virtual void EnsureCaretInRect(const gfx::Rect& rect) OVERRIDE;
+  virtual void OnCandidateWindowShow() OVERRIDE {}
+  virtual void OnCandidateWindowUpdate() OVERRIDE {}
+  virtual void OnCandidateWindowHide() OVERRIDE {}
 
   // Overridden from TextfieldViewsModel::Delegate:
   virtual void OnCompositionTextConfirmedOrCleared() OVERRIDE;