chrome.hid : enrich device info with Top-Level collections usages

device/hid/hid_usage_and_page.cc

 // 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.
 
-#include "device/serial/serial_device_enumerator.h"
+#include "device/hid/hid_usage_and_page.h"
 
 namespace device {
 
-SerialDeviceEnumerator::SerialDeviceEnumerator() {}
-
-SerialDeviceEnumerator::~SerialDeviceEnumerator() {}
+bool HidUsageAndPage::operator==(const HidUsageAndPage& other) const {
+  return usage == other.usage && usage_page == other.usage_page;
+}
 
 }  // namespace device