Added class BluetoothDeviceMac, returns mac device timing data

device/bluetooth/bluetooth_device_mac.h

Index: device/bluetooth/bluetooth_device_mac.h
diff --git a/device/bluetooth/bluetooth_device_mac.h b/device/bluetooth/bluetooth_device_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..b4fdb5cf2afe4de891a6d84ae4700b17842e4a67
--- /dev/null
+++ b/device/bluetooth/bluetooth_device_mac.h
@@ -0,0 +1,29 @@
+// Copyright 2015 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_BLUETOOTH_BLUETOOTH_DEVICE_MAC_H_
+#define DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_MAC_H_
+
+#include "device/bluetooth/bluetooth_device.h"
+
+@class NSDate;
+
+namespace device {
+
+class BluetoothDeviceMac : public BluetoothDevice {
+ public:
+  // Returns the time of the most recent interaction with the device.  Returns
+  // nil if the device has never been seen.
+  virtual NSDate* GetLastUpdateTime() const = 0;
+
+ protected:
+  BluetoothDeviceMac();

[scheib, 2015/06/30 16:58:18]

I'm presuming the chrome compile or presubmit tools required the Constructor and
Destructor? If tools allow them to be omitted, it would be cleaner as there's
really no need for the .mm file.

[krstnmnlsn, 2015/06/30 17:39:11]

Tried to avoid it as well.  But the compiler complains.

+  ~BluetoothDeviceMac() override;

[armansito, 2015/06/30 20:44:39]

The destructor should probably be public. 

[krstnmnlsn, 2015/07/01 17:37:16]

Done.  Can you tell me what the thinking is?

+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothDeviceMac);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_MAC_H_