Implement WebVR presentation pausing for VR Shell Menu Mode

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 40 matching lines @@
 
  private:
   // Binding callbacks.
   void onGetDisplays(mojo::WTFArray<device::blink::VRDisplayPtr>);
   void onPresentComplete(ScriptPromiseResolver*, unsigned index, bool success);
 
   // VRServiceClient.
   void OnDisplayChanged(device::blink::VRDisplayPtr) override;
   void OnExitPresent(unsigned index) override;
   void OnDisplayConnected(device::blink::VRDisplayPtr) override;
-  void OnDisplayDisconnected(unsigned) override;
+  void OnDisplayDisconnected(unsigned index) override;
+  void OnDisplayBlur(unsigned index) override;
+  void OnDisplayFocus(unsigned index) 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