Refactoring for the InputMethod & InputMethodDelegate interfaces.

ui/base/ime/input_method_mac.h

 // Copyright 2014 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_INPUT_METHOD_MAC_H_
 #define UI_BASE_IME_INPUT_METHOD_MAC_H_
 
 #include "ui/base/ime/input_method_base.h"
 
 namespace ui {
 
 // A ui::InputMethod implementation for Mac.
 // On the Mac, key events don't pass through InputMethod.
 // Instead, NSTextInputClient calls are bridged to the currently focused
 // ui::TextInputClient object.
 class UI_BASE_IME_EXPORT InputMethodMac : public InputMethodBase {
  public:
   explicit InputMethodMac(internal::InputMethodDelegate* delegate);
   ~InputMethodMac() override;
 
   // Overriden from InputMethod.
   bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                 NativeEventResult* result) override;
-  bool DispatchKeyEvent(const ui::KeyEvent& event) override;
+  void DispatchKeyEvent(ui::KeyEvent* event) override;
   void OnCaretBoundsChanged(const TextInputClient* client) override;
   void CancelComposition(const TextInputClient* client) override;
   void OnInputLocaleChanged() override;
   std::string GetInputLocale() override;
   bool IsCandidatePopupOpen() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InputMethodMac);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_MAC_H_