Manage UsbService lifetime in DeviceClient implementations.

device/usb/usb_device_handle_unittest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_io_thread.h"
+#include "device/test/test_device_client.h"
 #include "device/test/usb_test_gadget.h"
 #include "device/usb/usb_device.h"
 #include "device/usb/usb_device_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace device {
 
 namespace {
 
 class UsbDeviceHandleTest : public ::testing::Test {
  public:
   void SetUp() override {
     message_loop_.reset(new base::MessageLoopForUI);
     io_thread_.reset(new base::TestIOThread(base::TestIOThread::kAutoStart));
+    device_client_.reset(new TestDeviceClient(io_thread_->task_runner()));
   }
 
  protected:
   scoped_ptr<base::TestIOThread> io_thread_;
 
  private:
   scoped_ptr<base::MessageLoop> message_loop_;
+  scoped_ptr<TestDeviceClient> device_client_;
 };
 
 class TestOpenCallback {
  public:
   TestOpenCallback()
       : callback_(
             base::Bind(&TestOpenCallback::SetResult, base::Unretained(this))) {}
 
   scoped_refptr<UsbDeviceHandle> WaitForResult() {
     run_loop_.Run();
@@ skipping 197 matching lines @@
   TestResultCallback set_interface;
   handle->SetInterfaceAlternateSetting(2, 1, set_interface.callback());
   ASSERT_TRUE(set_interface.WaitForResult());
 
   handle->Close();
 }
 
 }  // namespace
 
 }  // namespace device