Switch to standard integer types in device/.

device/devices_app/usb/device_manager_impl_unittest.cc

 // Copyright 2015 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 <stddef.h>
+
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "device/core/mock_device_client.h"
@@ skipping 191 matching lines @@
     base::RunLoop loop;
     device_manager->GetDeviceChanges(base::Bind(&ExpectDeviceChangesAndThen,
                                                 added_guids, removed_guids,
                                                 loop.QuitClosure()));
     loop.Run();
   }
 }
 
 }  // namespace usb
 }  // namespace device