Reland: Build a basic Mojo service framework for device/usb

device/usb/device_impl.h

Index: device/usb/device_impl.h
diff --git a/device/usb/device_impl.h b/device/usb/device_impl.h
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+++ b/device/usb/device_impl.h
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+// 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.
+
+#ifndef DEVICE_USB_DEVICE_IMPL_H_
+#define DEVICE_USB_DEVICE_IMPL_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "device/usb/public/interfaces/device.mojom.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
+
+namespace device {
+
+class UsbDevice;
+
+namespace usb {
+
+// Implementation of the public Device interface. Instances of this class are
+// constructed by DeviceManagerImpl and are strongly bound to their MessagePipe
+// lifetime.
+class DeviceImpl : public Device {
+ public:
+  DeviceImpl(scoped_refptr<UsbDevice> device,
+             mojo::InterfaceRequest<Device> request);
+  ~DeviceImpl() override;
+
+ private:
+  // Device implementation:
+  void GetDeviceInfo(const GetDeviceInfoCallback& callback) override;
+
+  mojo::StrongBinding<Device> binding_;
+
+  scoped_refptr<UsbDevice> device_;
+  DeviceInfoPtr info_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceImpl);
+};
+
+}  // namespace usb
+}  // namespace device
+
+#endif  // DEVICE_USB_DEVICE_IMPL_H_