Removing -[NSString UTF8String] calls

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 527 matching lines @@
 
   DCHECK(device_mac);
   VLOG(3) << *device_mac << ": Device updated with "
           << base::SysNSStringToUTF8([advertisement_data description]);
 
   // Get Advertised UUIDs
   BluetoothDevice::UUIDList advertised_uuids;
   NSArray* service_uuids =
       [advertisement_data objectForKey:CBAdvertisementDataServiceUUIDsKey];
   for (CBUUID* uuid in service_uuids) {
-    advertised_uuids.push_back(BluetoothUUID([[uuid UUIDString] UTF8String]));
+    advertised_uuids.push_back(
+        BluetoothAdapterMac::BluetoothUUIDWithCBUUID(uuid));
   }
   NSArray* overflow_service_uuids = [advertisement_data
       objectForKey:CBAdvertisementDataOverflowServiceUUIDsKey];
   for (CBUUID* uuid in overflow_service_uuids) {
-    advertised_uuids.push_back(BluetoothUUID([[uuid UUIDString] UTF8String]));
+    advertised_uuids.push_back(
+        BluetoothAdapterMac::BluetoothUUIDWithCBUUID(uuid));
   }
 
   // Get Service Data.
   BluetoothDevice::ServiceDataMap service_data_map;
   NSDictionary* service_data =
       [advertisement_data objectForKey:CBAdvertisementDataServiceDataKey];
   for (CBUUID* uuid in service_data) {
     NSData* data = [service_data objectForKey:uuid];
     const uint8_t* bytes = static_cast<const uint8_t*>([data bytes]);
     size_t length = [data length];
-    service_data_map.emplace(BluetoothUUID([[uuid UUIDString] UTF8String]),
+    service_data_map.emplace(BluetoothAdapterMac::BluetoothUUIDWithCBUUID(uuid),
                              std::vector<uint8_t>(bytes, bytes + length));
   }
 
   // Get Tx Power.
   NSNumber* tx_power =
       [advertisement_data objectForKey:CBAdvertisementDataTxPowerLevelKey];
   int8_t clamped_tx_power = BluetoothDevice::ClampPower([tx_power intValue]);
 
   device_mac->UpdateAdvertisementData(
       BluetoothDevice::ClampPower(rssi), std::move(advertised_uuids),
@@ skipping 172 matching lines @@
     // hash the probability of this occuring with 10,000 devices
     // simultaneously present is 1e-6 (see
     // https://en.wikipedia.org/wiki/Birthday_problem#Probability_table).  We
     // ignore the second device by returning.
     return true;
   }
   return false;
 }
 
 }  // namespace device