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

ui/views/ime/input_method_bridge.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_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
 #define UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 58 matching lines @@
   virtual bool GetSelectionRange(gfx::Range* range) const OVERRIDE;
   virtual bool SetSelectionRange(const gfx::Range& range) OVERRIDE;
   virtual bool DeleteRange(const gfx::Range& range) OVERRIDE;
   virtual bool GetTextFromRange(const gfx::Range& range,
                                 string16* text) const OVERRIDE;
   virtual void OnInputMethodChanged() OVERRIDE;
   virtual bool ChangeTextDirectionAndLayoutAlignment(
       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 FocusChangeListener.
   virtual void OnWillChangeFocus(View* focused_before, View* focused) OVERRIDE;
   virtual void OnDidChangeFocus(View* focused_before, View* focused) OVERRIDE;
 
   ui::InputMethod* GetHostInputMethod() const;
 
  private:
   class HostObserver;
 
   void UpdateViewFocusState();
 
   ui::InputMethod* host_;
 
   // An observer observing the host input method for cases that the host input
   // method is destroyed before this bridge input method.
   scoped_ptr<HostObserver> host_observer_;
 
   const bool shared_input_method_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodBridge);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_