Add usb_service::UsbDeviceFilter class for device matching.

chromeos/dbus/permission_broker_client.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 CHROMEOS_DBUS_PERMISSION_BROKER_CLIENT_H_
 #define CHROMEOS_DBUS_PERMISSION_BROKER_CLIENT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client.h"
 
 namespace chromeos {
 
 // PermissionBrokerClient is used to communicate with the permission broker, a
 // process that allows requesting permission to access specific device nodes.
 // For example, one place that this client is used is within the USB extension
 // API code, where it is used to request explicit access to USB peripherals
 // which the user the browser runs under normally wouldn't have access to. For
 // more details on the permission broker see:
 // http://git.chromium.org/gitweb/?p=chromiumos/platform/permission_broker.git
 class CHROMEOS_EXPORT PermissionBrokerClient : public DBusClient {
  public:
   // The ResultCallback is used for both the RequestPathAccess and
-  // RequestUsbAcess methods. Its boolean parameter represents the result of the
-  // operation that it was submitted alongside.
+  // RequestUsbAccess methods. Its boolean parameter represents the result of
+  // the operation that it was submitted alongside.
   typedef base::Callback<void(bool)> ResultCallback;
 
   virtual ~PermissionBrokerClient();
 
   static PermissionBrokerClient* Create();
 
   // RequestPathAccess requests access to a single device node identified by
   // |path|. If |interface_id| value is passed (different than
   // UsbDevicePermissionData::ANY_INTERFACE), the request will check if a
   // specific interface is claimed while requesting access.
@@ skipping 18 matching lines @@
  protected:
   PermissionBrokerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PermissionBrokerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_PERMISSION_BROKER_CLIENT_H_