WebVR: lock focus while presenting to presenting window

third_party/WebKit/Source/modules/vr/VRDisplay.h

 // Copyright 2016 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 VRDisplay_h
 #define VRDisplay_h
 
 #include "core/dom/Document.h"
 #include "core/dom/FrameRequestCallback.h"
 #include "core/events/EventTarget.h"
@@ skipping 122 matching lines @@
   void OnActivate(device::mojom::blink::VRDisplayEventReason) override;
   void OnDeactivate(device::mojom::blink::VRDisplayEventReason) override;
 
   void OnVSync(device::mojom::blink::VRPosePtr,
                mojo::common::mojom::blink::TimeDeltaPtr,
                int16_t frame_id,
                device::mojom::blink::VRVSyncProvider::Status);
   void ConnectVSyncProvider();
   void OnVSyncConnectionError();
 
+  bool FocusedOrPresenting();
+
   ScriptedAnimationController& EnsureScriptedAnimationController(Document*);
   void ProcessScheduledAnimations(double timestamp);
   void ProcessScheduledWindowAnimations(double timestamp);
 
   Member<NavigatorVR> navigator_vr_;
   unsigned display_id_ = 0;
   String display_name_;
   bool is_connected_ = false;
   bool is_presenting_ = false;
   bool is_valid_device_for_presenting_ = true;
@@ skipping 64 matching lines @@
   kRequestDenied = 12,
   kFullscreenNotEnabled = 13,
   kPresentationResultMax,  // Must be last member of enum.
 };
 
 void ReportPresentationResult(PresentationResult);
 
 }  // namespace blink
 
 #endif  // VRDisplay_h