device: Cleanup class/struct forward declarations

device/usb/mojo/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_MOJO_DEVICE_MANAGER_IMPL_H_
 #define DEVICE_USB_MOJO_DEVICE_MANAGER_IMPL_H_
 
 #include <memory>
 #include <queue>
 #include <set>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "device/usb/public/interfaces/device_manager.mojom.h"
 #include "device/usb/usb_service.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 
-namespace base {
-class SequencedTaskRunner;
-}
-
 namespace device {
 
 class UsbDevice;
-class UsbDeviceFilter;
-class UsbDeviceHandle;
 
 namespace usb {
 
 class PermissionProvider;
 
 // Implementation of the public DeviceManager interface. This interface can be
 // requested from the devices app located at "devices", if available.
 class DeviceManagerImpl : public DeviceManager, public UsbService::Observer {
  public:
   static void Create(base::WeakPtr<PermissionProvider> permission_provider,
@@ skipping 37 matching lines @@
 
   base::WeakPtrFactory<DeviceManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceManagerImpl);
 };
 
 }  // namespace usb
 }  // namespace device
 
 #endif  // DEVICE_USB_MOJO_DEVICE_MANAGER_IMPL_H_