bluetooth: macOS: Removing useless |.get()|

device/bluetooth/test/mock_bluetooth_cbservice_mac.mm

 // Copyright 2016 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/test/mock_bluetooth_cbservice_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "device/bluetooth/test/bluetooth_test.h"
 #include "device/bluetooth/test/mock_bluetooth_cbcharacteristic_mac.h"
@@ skipping 42 matching lines @@
     return YES;
   }
   return [super isKindOfClass:aClass];
 }
 
 - (CBPeripheral*)peripheral {
   return _peripheral;
 }
 
 - (CBUUID*)UUID {
-  return _UUID.get();
+  return _UUID;
 }
 
 - (void)addCharacteristicWithUUID:(CBUUID*)cb_uuid properties:(int)properties {
   scoped_nsobject<MockCBCharacteristic> characteristic_mock(
       [[MockCBCharacteristic alloc] initWithService:self.service
                                              CBUUID:cb_uuid
                                          properties:properties]);
-  [_characteristics.get() addObject:characteristic_mock];
+  [_characteristics addObject:characteristic_mock];
 }
 
 - (void)removeCharacteristicMock:(MockCBCharacteristic*)characteristic_mock {
-  [_characteristics.get() removeObject:characteristic_mock];
+  [_characteristics removeObject:characteristic_mock];
 }
 
 - (CBService*)service {
   return ObjCCast<CBService>(self);
 }
 
 - (NSArray*)characteristics {
-  return _characteristics.get();
+  return _characteristics;
 }
 
 @end