Convert DeviceManagerDelegate to PermissionProvider mojo interface.

device/devices_app/usb/public/cpp/device_manager_delegate.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_DEVICES_APP_USB_PUBLIC_CPP_DEVICE_MANAGER_DELEGATE_H_
-#define DEVICE_DEVICES_APP_USB_PUBLIC_CPP_DEVICE_MANAGER_DELEGATE_H_
-
-#include "device/devices_app/usb/public/interfaces/device.mojom.h"
-
-namespace device {
-namespace usb {
-
-// Interface used by DeviceManager instances to delegate certain decisions and
-// behaviors out to their embedder.
-class DeviceManagerDelegate {
- public:
-  virtual ~DeviceManagerDelegate() {}
-
-  // Determines whether a given device should be accessible to clients of the
-  // DeviceManager instance.
-  virtual bool IsDeviceAllowed(const DeviceInfo& info) = 0;
-};
-
-}  // namespace usb
-}  // namespace device
-
-#endif  // DEVICE_DEVICES_APP_USB_PUBLIC_CPP_DEVICE_MANAGER_DELEGATE_H_