Add support of vrdisplayconnect and vrdisplaydisconnect event

third_party/WebKit/Source/modules/vr/VRController.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 VRController_h
 #define VRController_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/Document.h"
 #include "device/vr/vr_service.mojom-blink.h"
@@ skipping 29 matching lines @@
     VRDisplay* getDisplayForIndex(unsigned index);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     // Binding callbacks.
     void onGetDisplays(mojo::WTFArray<device::blink::VRDisplayPtr>);
 
     // VRServiceClient.
     void OnDisplayChanged(device::blink::VRDisplayPtr) override;
+    void OnDisplayConnected(device::blink::VRDisplayPtr) override;
+    void OnDisplayDisconnected(unsigned) override;
 
     // ContextLifecycleObserver.
     void contextDestroyed() override;
 
     Member<NavigatorVR> m_navigatorVR;
     VRDisplayVector m_displays;
 
     Deque<std::unique_ptr<VRGetDevicesCallback>> m_pendingGetDevicesCallbacks;
     device::blink::VRServicePtr m_service;
     mojo::Binding<device::blink::VRServiceClient> m_binding;
 };
 
 } // namespace blink
 
 #endif // VRController_h