Eliminate ApiResourceEventNotifier.

chrome/browser/extensions/api/usb/usb_device_resource.h

 // Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/extensions/api/api_resource.h"
 #include "chrome/browser/usb/usb_device.h"
 #include "chrome/common/extensions/api/usb.h"
 
 class UsbDevice;
 
 namespace net {
 class IOBuffer;
 }  // namespace net
 
 namespace extensions {
 
-class ApiResourceEventNotifier;
-
 // A UsbDeviceResource is an ApiResource wrapper for a UsbDevice.
 class UsbDeviceResource : public ApiResource {
  public:
   UsbDeviceResource(const std::string& owner_extension_id,
-                    ApiResourceEventNotifier* notifier,
                     scoped_refptr<UsbDevice> device);
   virtual ~UsbDeviceResource();
 
   scoped_refptr<UsbDevice> device() {
     return device_;
   }
 
  private:
   scoped_refptr<UsbDevice> device_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDeviceResource);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_USB_USB_DEVICE_RESOURCE_H_