Added bluetooth LE support on Mac platform

device/bluetooth/bluetooth.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 54 matching lines @@
         'bluetooth_gatt_notify_session_chromeos.cc',
         'bluetooth_gatt_notify_session_chromeos.h',
         'bluetooth_gatt_service.cc',
         'bluetooth_gatt_service.h',
         'bluetooth_init_win.cc',
         'bluetooth_init_win.h',
         'bluetooth_l2cap_channel_mac.mm',
         'bluetooth_l2cap_channel_mac.h',
         'bluetooth_low_energy_defs_win.cc',
         'bluetooth_low_energy_defs_win.h',
+        'bluetooth_low_energy_device_mac.h',
+        'bluetooth_low_energy_device_mac.mm',
+        'bluetooth_low_energy_discovery_manager_mac.h',
+        'bluetooth_low_energy_discovery_manager_mac.mm',
         'bluetooth_low_energy_win.cc',
         'bluetooth_low_energy_win.h',
         'bluetooth_pairing_chromeos.cc',
         'bluetooth_pairing_chromeos.h',
         'bluetooth_remote_gatt_characteristic_chromeos.cc',
         'bluetooth_remote_gatt_characteristic_chromeos.h',
         'bluetooth_remote_gatt_descriptor_chromeos.cc',
         'bluetooth_remote_gatt_descriptor_chromeos.h',
         'bluetooth_remote_gatt_service_chromeos.cc',
         'bluetooth_remote_gatt_service_chromeos.h',
@@ skipping 94 matching lines @@
         'test/mock_bluetooth_gatt_notify_session.cc',
         'test/mock_bluetooth_gatt_notify_session.h',
         'test/mock_bluetooth_gatt_service.cc',
         'test/mock_bluetooth_gatt_service.h',
         'test/mock_bluetooth_socket.cc',
         'test/mock_bluetooth_socket.h',
       ],
     },
   ],
 }