Runtime checks so that CoreBluetooth only used on >= 10.10

device/bluetooth/bluetooth_adapter_mac.h

 // 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_MAC_H_
 
 #include <IOKit/IOReturn.h>
 
 #include <string>
@@ skipping 73 matching lines @@
   void ClassicDiscoveryStopped(bool unexpected) override;
 
   // BluetoothLowEnergyDiscoveryManagerMac::Observer override:
   void LowEnergyDeviceUpdated(CBPeripheral* peripheral,
                               NSDictionary* advertisementData,
                               int rssi) override;
 
   // Registers that a new |device| has connected to the local host.
   void DeviceConnected(IOBluetoothDevice* device);
 
+  // We only use CoreBluetooth when OS X >= 10.10. This because the
+  // CBCentralManager destructor was found to crash on the mac_chromium_rel_ng
+  // builder running 10.9.5. May also cause blued to crash on OS X 10.9.5
+  // (crbug.com/506287).
+  static bool IsLowEnergyAvailable();
+
  protected:
   // BluetoothAdapter override:
   void RemovePairingDelegateInternal(
       device::BluetoothDevice::PairingDelegate* pairing_delegate) override;
 
  private:
   friend class BluetoothAdapterMacTest;
 
   BluetoothAdapterMac();
   ~BluetoothAdapterMac() override;
@@ skipping 42 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> ui_task_runner_;
 
   base::WeakPtrFactory<BluetoothAdapterMac> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_MAC_H_