Isolate a presenting VR device from pages other than the one presenting.

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 16 matching lines @@
     USING_GARBAGE_COLLECTED_MIXIN(VRController);
     WTF_MAKE_NONCOPYABLE(VRController);
 public:
     VRController(NavigatorVR*);
     virtual ~VRController();
 
     // VRService.
     void getDisplays(ScriptPromiseResolver*);
     device::blink::VRPosePtr getPose(unsigned index);
     void resetPose(unsigned index);
-    void requestPresent(unsigned index);
+    void requestPresent(ScriptPromiseResolver*, unsigned index);
     void exitPresent(unsigned index);
-    void submitFrame(unsigned index);
+    void submitFrame(unsigned index, device::blink::VRPosePtr);
     void updateLayerBounds(unsigned index,
         device::blink::VRLayerBoundsPtr leftBounds,
         device::blink::VRLayerBoundsPtr rightBounds);
 
     VRDisplay* createOrUpdateDisplay(const device::blink::VRDisplayPtr&);
     VRDisplayVector updateDisplays(mojo::WTFArray<device::blink::VRDisplayPtr>);
     VRDisplay* getDisplayForIndex(unsigned index);
 
     DECLARE_VIRTUAL_TRACE();
 
 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;
 
     // 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