bluetooth: Add usecounter for gattserverdisconnected

third_party/WebKit/Source/modules/bluetooth/BluetoothDevice.h

 // Copyright 2014 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 BluetoothDevice_h
 #define BluetoothDevice_h
 
 #include <memory>
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
@@ skipping 73 matching lines @@
   // Interface required by Garbage Collection:
   DECLARE_VIRTUAL_TRACE();
 
   // IDL exposed interface:
   String id() { return device_->id; }
   String name() { return device_->name; }
   BluetoothRemoteGATTServer* gatt() { return gatt_; }
 
   DEFINE_ATTRIBUTE_EVENT_LISTENER(gattserverdisconnected);
 
+ protected:
+  // EventTarget overrides:
+  void AddedEventListener(const AtomicString& eventType,
+                          RegisteredEventListener&) override;
+
  private:
   // Holds all GATT Attributes associated with this BluetoothDevice.
   Member<BluetoothAttributeInstanceMap> attribute_instance_map_;
 
   mojom::blink::WebBluetoothDevicePtr device_;
   Member<BluetoothRemoteGATTServer> gatt_;
   Member<Bluetooth> bluetooth_;
 };
 
 }  // namespace blink
 
 #endif  // BluetoothDevice_h