Change UsbDeviceFilter to use const references instead of

device/usb/usb_device_filter.h

 // 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 DEVICE_USB_USB_DEVICE_FILTER_H_
 #define DEVICE_USB_USB_DEVICE_FILTER_H_
 
 #include <stdint.h>
 
 #include <memory>
+#include <string>
 #include <vector>
 
-#include "base/memory/ref_counted.h"
 #include "base/optional.h"
 
 namespace base {
 class Value;
 }
 
 namespace device {
 
 class UsbDevice;
 
 struct UsbDeviceFilter {
   UsbDeviceFilter();
   UsbDeviceFilter(const UsbDeviceFilter& other);
   ~UsbDeviceFilter();
 
-  bool Matches(scoped_refptr<UsbDevice> device) const;
+  // Returns true if |device| matches this filter.
+  bool Matches(const UsbDevice& device) const;
   std::unique_ptr<base::Value> ToValue() const;
 
-  static bool MatchesAny(scoped_refptr<UsbDevice> device,
+  // Returns true if device matches any filter in |filters|, or if |filters| is
+  // empty.
+  static bool MatchesAny(const UsbDevice& device,
                          const std::vector<UsbDeviceFilter>& filters);
 
   base::Optional<uint16_t> vendor_id;
   base::Optional<uint16_t> product_id;
   base::Optional<uint8_t> interface_class;
   base::Optional<uint8_t> interface_subclass;
   base::Optional<uint8_t> interface_protocol;
   base::Optional<std::string> serial_number;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_FILTER_H_