Add more generic filters to the chrome.hid.getDevices API.

device/hid/hid_device_filter.h

Index: device/hid/hid_device_filter.h
diff --git a/device/hid/hid_device_filter.h b/device/hid/hid_device_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..a0abbb746583196f70bfed21e383bdfdbd937f1c
--- /dev/null
+++ b/device/hid/hid_device_filter.h
@@ -0,0 +1,43 @@
+// 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_HID_HID_DEVICE_FILTER_H_
+#define DEVICE_HID_HID_DEVICE_FILTER_H_
+
+#include <stdint.h>
+#include <vector>
+
+namespace device {
+
+struct HidDeviceInfo;
+
+class HidDeviceFilter {
+ public:
+  HidDeviceFilter();
+  ~HidDeviceFilter();
+
+  void SetVendorId(uint16_t vendor_id);
+  void SetProductId(uint16_t product_id);
+  void SetUsagePage(uint16_t usage_page);
+  void SetUsage(uint16_t usage);
+
+  bool Matches(const HidDeviceInfo& device_info) const;
+
+  static bool MatchesAny(const HidDeviceInfo& device_info,
+                         const std::vector<HidDeviceFilter>& filters);
+
+ private:
+  uint16_t vendor_id_;
+  uint16_t product_id_;
+  uint16_t usage_page_;
+  uint16_t usage_;
+  bool vendor_id_set_ : 1;
+  bool product_id_set_ : 1;
+  bool usage_page_set_ : 1;
+  bool usage_set_ : 1;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_DEVICE_FILTER_H_