Bluetooth: mac: Working on macOS descriptor implementation.

device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h

Index: device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h
diff --git a/device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h b/device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h
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+++ b/device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h
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+// Copyright 2017 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_TEST_MOCK_BLUETOOTH_CBDESCRIPTOR_MAC_H_
+#define DEVICE_BLUETOOTH_TEST_MOCK_BLUETOOTH_CBDESCRIPTOR_MAC_H_
+
+#include "base/mac/sdk_forward_declarations.h"
+#include "build/build_config.h"
+
+#import <CoreBluetooth/CoreBluetooth.h>
+
+// This class mocks the behavior of a CBDescriptor.
+@interface MockCBDescriptor : NSObject
+
+@property(readonly, nonatomic) CBUUID* UUID;
+@property(readonly, nonatomic) CBDescriptor* descriptor;
+
+- (instancetype)initWithCharacteristic:(CBCharacteristic*)characteristic
+                                CBUUID:(CBUUID*)uuid;
+
+@end
+
+#endif  // DEVICE_BLUETOOTH_TEST_MOCK_BLUETOOTH_CBDESCRIPTOR_MAC_H_