Implement WebVR presentation pausing for VR Shell Menu Mode

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 "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/Document.h"
 #include "core/dom/FrameRequestCallback.h"
@@ skipping 92 matching lines @@
  private:
   void onFullscreenCheck(TimerBase*);
   void onPresentComplete(ScriptPromiseResolver*, bool);
 
   void onDisplayConnected();
   void onDisplayDisconnected();
 
   // VRDisplayClient
   void OnDisplayChanged(device::mojom::blink::VRDisplayInfoPtr) override;
   void OnExitPresent() override;
+  void OnDisplayBlur() override;
+  void OnDisplayFocus() override;
 
   ScriptedAnimationController& ensureScriptedAnimationController(Document*);
 
   Member<NavigatorVR> m_navigatorVR;
   unsigned m_displayId;
   String m_displayName;
   bool m_isConnected;
   bool m_isPresenting;
   bool m_canUpdateFramePose;
-  unsigned m_compositorHandle;
   Member<VRDisplayCapabilities> m_capabilities;
   Member<VRStageParameters> m_stageParameters;
   Member<VREyeParameters> m_eyeParametersLeft;
   Member<VREyeParameters> m_eyeParametersRight;
   device::mojom::blink::VRPosePtr m_framePose;
   VRLayer m_layer;
   double m_depthNear;
   double m_depthFar;
 
   void dispose();
 
   Timer<VRDisplay> m_fullscreenCheckTimer;
   gpu::gles2::GLES2Interface* m_contextGL;
   Member<WebGLRenderingContextBase> m_renderingContext;
 
   Member<ScriptedAnimationController> m_scriptedAnimationController;
   bool m_animationCallbackRequested;
   bool m_inAnimationFrame;
+  bool m_displayBlurred;
 
   device::mojom::blink::VRDisplayPtr m_display;
 
   mojo::Binding<device::mojom::blink::VRDisplayClient> m_binding;
 };
 
 using VRDisplayVector = HeapVector<Member<VRDisplay>>;
 
 enum class PresentationResult {
   Requested = 0,
@@ skipping 10 matching lines @@
   ServiceInactive = 11,
   RequestDenied = 12,
   PresentationResultMax,  // Must be last member of enum.
 };
 
 void ReportPresentationResult(PresentationResult);
 
 }  // namespace blink
 
 #endif  // VRDisplay_h