Privatize StrongBinding lifetime management

services/ui/ime/test_ime_driver/test_ime_driver.h

 // 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.
 
 #ifndef SERVICES_UI_IME_TEST_IME_DRIVER_TEST_IME_DRIVER_H_
 #define SERVICES_UI_IME_TEST_IME_DRIVER_TEST_IME_DRIVER_H_
 
+#include <stdint.h>
+
 #include <map>
+#include <memory>
 
-#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "mojo/public/cpp/bindings/binding.h"
 #include "services/ui/public/interfaces/ime.mojom.h"
 
 namespace ui {
 namespace test {
 
 class TestIMEDriver : public ui::mojom::IMEDriver {
  public:
-  explicit TestIMEDriver(mojom::IMEDriverRequest request);
+  TestIMEDriver();
   ~TestIMEDriver() override;
 
  private:
   // ui::mojom::IMEDriver:
   void StartSession(
       int32_t session_id,
       ui::mojom::TextInputClientPtr client,
       ui::mojom::InputMethodRequest input_method_request) override;
   void CancelSession(int32_t session_id) override;
 
-  mojo::StrongBinding<mojom::IMEDriver> driver_binding_;
   std::map<int32_t, std::unique_ptr<mojo::Binding<mojom::InputMethod>>>
       input_method_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(TestIMEDriver);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // SERVICES_UI_IME_TEST_IME_DRIVER_TEST_IME_DRIVER_H_