Experimental USB API

chrome/browser/extensions/api/api_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_API_RESOURCE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_API_RESOURCE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 
 namespace extensions {
 
 class APIResourceController;
 class APIResourceEventNotifier;
 
 // An APIResource represents something that an extension API manages, such as a
 // socket or a serial-port connection.
 class APIResource {
  public:
   virtual ~APIResource();
 
  protected:
   enum APIResourceType {
     SocketResource,
-    SerialConnectionResource
+    SerialConnectionResource,
+    UsbDeviceResource,
   };
   APIResource(APIResourceType api_resource_type,
               APIResourceEventNotifier* event_notifier);
 
   APIResourceType api_resource_type() const;
   APIResourceEventNotifier* event_notifier() const;
 
  private:
   APIResourceType api_resource_type_;
   scoped_refptr<APIResourceEventNotifier> event_notifier_;
 
   friend class APIResourceController;
   DISALLOW_COPY_AND_ASSIGN(APIResource);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_API_RESOURCE_H_