Runtime checks so that CoreBluetooth only used on >= 10.10

device/bluetooth/bluetooth_low_energy_discovery_manager_mac.h

 // 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_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_
 
 #if defined(OS_IOS)
 #import <CoreBluetooth/CoreBluetooth.h>
 #else
@@ skipping 63 matching lines @@
   // CoreBluetooth is available.
   virtual void SetManagerForTesting(CBCentralManager* manager);
 
   friend class BluetoothLowEnergyDiscoveryManagerMacDelegate;
   friend class BluetoothAdapterMacTest;
 
   // Observer interested in notifications from us.
   Observer* observer_;
 
   // Underlying CoreBluetooth central manager.
-  //
-  // Note: Intentionally leaked. Deallocating CBCentralManager
-  // results in a crash, at least when running OSX 10.9.5 on a
-  // mac_chromuim_rel_ng trybot. On the other hand, restricting |manager_| use
-  // to 10.10 and later would mean the code is unrun and untested by the current
-  // trybots. To work around this we call retain on |manager_| after allocation,
-  // so that the object is leaked.
   base::scoped_nsobject<CBCentralManager> manager_;
 
   // Discovery has been initiated by calling the API StartDiscovery().
   bool discovering_;
 
   // A discovery has been initiated but has not started yet because it's
   // waiting for Bluetooth to turn on.
   bool pending_;
 
   // Delegate of the central manager.
   base::scoped_nsobject<BluetoothLowEnergyDiscoveryManagerMacBridge> bridge_;
 
   // List of service UUIDs to scan.
   BluetoothDevice::UUIDList services_uuids_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyDiscoveryManagerMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_DISCOVERY_MANAGER_MAC_H_