bluetooth: Return false for IsPresent only when bluetooth is not supported

device/bluetooth/bluetooth_adapter_mac.mm

 // 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.
 
 #include "device/bluetooth/bluetooth_adapter_mac.h"
 
 #import <IOBluetooth/objc/IOBluetoothDevice.h>
 #import <IOBluetooth/objc/IOBluetoothHostController.h>
 #include <stddef.h>
 
@@ skipping 110 matching lines @@
   NOTIMPLEMENTED();
 }
 
 bool BluetoothAdapterMac::IsInitialized() const {
   return true;
 }
 
 bool BluetoothAdapterMac::IsPresent() const {
   bool is_present = !address_.empty();
   if (IsLowEnergyAvailable()) {
-    is_present = is_present || ([low_energy_central_manager_ state] ==
-                                CBCentralManagerStatePoweredOn);
+    is_present = is_present || ([low_energy_central_manager_ state] !=
+                                CBCentralManagerStateUnsupported);
   }
   return is_present;
 }
 
 bool BluetoothAdapterMac::IsPowered() const {
   bool is_powered = classic_powered_;
   if (IsLowEnergyAvailable()) {
     is_powered = is_powered || ([low_energy_central_manager_ state] ==
                                 CBCentralManagerStatePoweredOn);
   }
@@ skipping 448 matching lines @@
   std::string device_address =
       BluetoothLowEnergyDeviceMac::GetPeripheralHashAddress(peripheral);
   DevicesMap::const_iterator iter = devices_.find(device_address);
   if (iter == devices_.end()) {
     return nil;
   }
   return static_cast<BluetoothLowEnergyDeviceMac*>(iter->second);
 }
 
 }  // namespace device