Bluetooth: macOS: Adding counter for service discovery callbacks.

device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm

 // 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.
 
 #include "device/bluetooth/test/mock_bluetooth_cbperipheral_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "device/bluetooth/test/bluetooth_test_mac.h"
 #include "device/bluetooth/test/mock_bluetooth_cbcharacteristic_mac.h"
@@ skipping 65 matching lines @@
   _state = state;
   if (_state == CBPeripheralStateDisconnected) {
     _services.reset();
   }
 }
 
 - (void)discoverServices:(NSArray*)serviceUUIDs {
   if (_bluetoothTestMac) {
     _bluetoothTestMac->OnFakeBluetoothServiceDiscovery();
   }
-  [_delegate peripheral:self.peripheral didDiscoverServices:nil];
 }
 
 - (void)discoverCharacteristics:(NSArray*)characteristics
                      forService:(CBService*)service {
 }
 
 - (void)discoverDescriptorsForCharacteristic:(CBCharacteristic*)characteristic {
   MockCBCharacteristic* mock_characteristic =
       ObjCCast<MockCBCharacteristic>(characteristic);
   [mock_characteristic discoverDescriptors];
@@ skipping 90 matching lines @@
 - (CBPeripheral*)peripheral {
   return ObjCCast<CBPeripheral>(self);
 }
 
 - (void)setNotifyValue:(BOOL)notification
      forCharacteristic:(CBCharacteristic*)characteristic {
   _bluetoothTestMac->OnFakeBluetoothGattSetCharacteristicNotification();
 }
 
 @end