Convert usages of mojo::ErrorHandler in //device to callbacks.

device/devices_app/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/devices_app/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 base {
 class SequencedTaskRunner;
 }
 
-namespace mojo {
-class ErrorHandler;
-}
-
 namespace device {
 
 class UsbDevice;
 class UsbDeviceFilter;
 class UsbDeviceHandle;
 
 namespace usb {
 
 class DeviceManagerDelegate;
 
 // Implementation of the public DeviceManager interface. This interface can be
 // requested from the devices app located at "system:devices", if available.
 class DeviceManagerImpl : public DeviceManager {
  public:
   DeviceManagerImpl(
       mojo::InterfaceRequest<DeviceManager> request,
       scoped_ptr<DeviceManagerDelegate> delegate,
       scoped_refptr<base::SequencedTaskRunner> service_task_runner);
   ~DeviceManagerImpl() override;
 
-  void set_error_handler(mojo::ErrorHandler* error_handler);
+  void set_connection_error_handler(const mojo::Closure& error_handler);
 
  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(EnumerationOptionsPtr options,
                     const GetDevicesCallback& callback,
                     const std::vector<scoped_refptr<UsbDevice>>& devices);
 
   mojo::StrongBinding<DeviceManager> binding_;
 
   scoped_ptr<DeviceManagerDelegate> delegate_;
   scoped_refptr<base::SequencedTaskRunner> service_task_runner_;
 
   base::WeakPtrFactory<DeviceManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceManagerImpl);
 };
 
 }  // namespace usb
 }  // namespace device
 
 #endif  // DEVICE_USB_DEVICE_MANAGER_IMPL_H_