Revert of IME for Mus: Make InputMethodMus use the IME Mojo API.

services/ui/ime/test_ime_driver/main.cc

 // Copyright 2016 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.
 
 #include "services/shell/public/c/main.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/shell/public/cpp/service.h"
 #include "services/shell/public/cpp/service_runner.h"
 #include "services/ui/ime/test_ime_driver/test_ime_driver.h"
 
 namespace ui {
 namespace test {
 
 class TestIME : public shell::Service {
  public:
   TestIME() {}
   ~TestIME() override {}
 
  private:
   // shell::Service:
-  bool OnConnect(const shell::Identity& remote_identity,
-                 shell::InterfaceRegistry* registry) override {
-    return true;
-  }
   void OnStart(const shell::Identity& identity) override {
     mojom::IMEDriverPtr ime_driver_ptr;
     new TestIMEDriver(GetProxy(&ime_driver_ptr));
 
     ui::mojom::IMERegistrarPtr ime_registrar;
     connector()->ConnectToInterface("mojo:ui", &ime_registrar);
     ime_registrar->RegisterDriver(std::move(ime_driver_ptr));
   }
 
   DISALLOW_COPY_AND_ASSIGN(TestIME);
 };
 
 }  // namespace test
 }  // namespace ui
 
 MojoResult ServiceMain(MojoHandle service_request_handle) {
   shell::ServiceRunner runner(new ui::test::TestIME);
   return runner.Run(service_request_handle);
 }