HID backend

device/hid/hid_utils_mac.h

Index: device/hid/hid_utils_mac.h
diff --git a/device/hid/hid_utils_mac.h b/device/hid/hid_utils_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..7aa045b8b6a95b03e2849f13f901db4fa15c3272
--- /dev/null
+++ b/device/hid/hid_utils_mac.h
@@ -0,0 +1,23 @@
+// Copyright (c) 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_UTILS_MAC_H_
+#define DEVICE_HID_HID_UTILS_MAC_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+
+#include <IOKit/hid/IOHIDManager.h>
+
+namespace device {
+

[Ken Rockot(use gerrit already), 2014/01/21 23:03:39]

Can you move these into a namespace or make the naming more specific to HID?
i.e. device::hid::GetIntProperty or device::GetHIDIntProperty?

[Bei Zhang, 2014/01/24 12:48:47]

Done.

+bool GetIntProperty(IOHIDDeviceRef device, CFStringRef key, int32_t* result);
+
+bool GetStringProperty(IOHIDDeviceRef device,
+                       CFStringRef key,
+                       std::string* result);
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_UTILS_MAC_H_