Add usb_service::UsbDeviceFilter class for device matching.

components/usb_service/usb_device_filter.h

Index: components/usb_service/usb_device_filter.h
diff --git a/components/usb_service/usb_device_filter.h b/components/usb_service/usb_device_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..76a3b2c73967f6bf2672e610988bdd7298d7e021
--- /dev/null
+++ b/components/usb_service/usb_device_filter.h
@@ -0,0 +1,48 @@
+// Copyright 2014 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 COMPONENTS_USB_SERVICE_USB_DEVICE_FILTER_H_
+#define COMPONENTS_USB_SERVICE_USB_DEVICE_FILTER_H_
+
+#include "base/memory/ref_counted.h"
+#include "components/usb_service/usb_service_export.h"
+
+namespace base {
+class Value;
+}
+
+namespace usb_service {
+
+class UsbDevice;
+
+class USB_SERVICE_EXPORT UsbDeviceFilter {
+ public:
+  UsbDeviceFilter();
+  ~UsbDeviceFilter();
+
+  void SetVendorId(uint16 vendor_id);
+  void SetProductId(uint16 product_id);
+  void SetInterfaceClass(uint8 interface_class);
+  void SetInterfaceSubclass(uint8 interface_subclass);
+  void SetInterfaceProtocol(uint8 interface_protocol);
+
+  bool Matches(scoped_refptr<UsbDevice> device);
+  base::Value* ToValue() const;
+
+ private:
+  uint16 vendor_id_;
+  uint16 product_id_;
+  uint8 interface_class_;
+  uint8 interface_subclass_;
+  uint8 interface_protocol_;
+  bool vendor_id_set_ : 1;
+  bool product_id_set_ : 1;
+  bool interface_class_set_ : 1;
+  bool interface_subclass_set_ : 1;
+  bool interface_protocol_set_ : 1;
+};
+
+}  // namespace usb_service
+
+#endif  // COMPONENTS_USB_SERVICE_USB_DEVICE_FILTER_H_