Reland: Introduce the devices Mojo app

device/usb/device_manager_impl.h

-// 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_MANAGER_IMPL_H_
-#define DEVICE_USB_DEVICE_MANAGER_IMPL_H_
-
-#include <vector>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "device/usb/public/interfaces/device_manager.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;
-class UsbDeviceFilter;
-class UsbDeviceHandle;
-
-namespace usb {
-
-class DeviceManagerDelegate;
-
-// Implementation of the public DeviceManager interface. Clients in the browser
-// can connect to this service via DeviceClient::ConnectToUSBDeviceManager.
-class DeviceManagerImpl : public DeviceManager {
- public:
-  DeviceManagerImpl(mojo::InterfaceRequest<DeviceManager> request,
-                    scoped_ptr<DeviceManagerDelegate> delegate);
-  ~DeviceManagerImpl() override;
-
- private:
-  // DeviceManager implementation:
-  void GetDevices(EnumerationOptionsPtr options,
-                  const GetDevicesCallback& callback) override;
-  void OpenDevice(const mojo::String& guid,
-                  mojo::InterfaceRequest<Device> device_request,
-                  const OpenDeviceCallback& callback) override;
-
-  // Callback to handle the async response from the underlying UsbService.
-  void OnGetDevices(const GetDevicesCallback& callback,
-                    const std::vector<UsbDeviceFilter>& filters,
-                    const std::vector<scoped_refptr<UsbDevice>>& devices);
-
-  // Callback to handle the async Open response from a UsbDevice.
-  void OnOpenDevice(const OpenDeviceCallback& callback,
-                    mojo::InterfaceRequest<Device> device_request,
-                    scoped_refptr<UsbDeviceHandle> device_handle);
-
-  mojo::StrongBinding<DeviceManager> binding_;
-
-  scoped_ptr<DeviceManagerDelegate> delegate_;
-
-  base::WeakPtrFactory<DeviceManagerImpl> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeviceManagerImpl);
-};
-
-}  // namespace usb
-}  // namespace device
-
-#endif  // DEVICE_USB_DEVICE_MANAGER_IMPL_H_