Enable Config::MUS to use classic IME instead of servicified IME.

ui/aura/test/mus/input_method_mus_test_api.h

 // Copyright 2017 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_AURA_TEST_MUS_INPUT_METHOD_MUS_TEST_API_H_
 #define UI_AURA_TEST_MUS_INPUT_METHOD_MUS_TEST_API_H_
 
 #include "base/macros.h"
 #include "ui/aura/mus/input_method_mus.h"
 
 namespace aura {
 
 class InputMethodMusTestApi {
  public:
   static void SetInputMethod(InputMethodMus* input_method_mus,
                              ui::mojom::InputMethod* input_method) {
     input_method_mus->input_method_ = input_method;
   }
 
   static void CallSendKeyEventToInputMethod(
       InputMethodMus* input_method_mus,
       const ui::KeyEvent& event,
-      std::unique_ptr<InputMethodMus::EventResultCallback> ack_callback) {
+      std::unique_ptr<InputMethodMus::AckCallback> ack_callback) {
     input_method_mus->SendKeyEventToInputMethod(event, std::move(ack_callback));
   }
 
   static void Disable(InputMethodMus* input_method) {
     DCHECK(input_method->pending_callbacks_.empty());
     input_method->ime_server_.reset();
   }
 
   static void CallOnDidChangeFocusedClient(InputMethodMus* input_method,
                                            ui::TextInputClient* focused_before,
                                            ui::TextInputClient* focused) {
     input_method->OnDidChangeFocusedClient(focused_before, focused);
   }
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(InputMethodMusTestApi);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_MUS_INPUT_METHOD_MUS_TEST_API_H_