bluetooth: Add serviceInstanceID to WebBluetoothService

public/platform/modules/bluetooth/WebBluetoothGATTService.h

 // 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.
 
 #ifndef WebBluetoothGATTService_h
 #define WebBluetoothGATTService_h
 
 #include "public/platform/WebString.h"
 
 namespace blink {
 
 struct WebBluetoothGATTService {
-    WebBluetoothGATTService(const WebString& uuid,
+    WebBluetoothGATTService(const WebString& serviceInstanceID,
+        const WebString& uuid,
         bool isPrimary,
         const WebString& deviceInstanceID)
         : uuid(uuid)
         , isPrimary(isPrimary)
         , deviceInstanceID(deviceInstanceID)
     {
     }
 
     // Members corresponding to BluetoothGATTService attributes as
     // specified in the IDL.
+    const WebString serviceInstanceID;
     const WebString uuid;
     const bool isPrimary;
     const WebString deviceInstanceID;
 };
 
 } // namespace blink
 
 #endif // WebBluetoothGATTService_h