Adjust the timestamp for VRDisplay.requestAnimationFrame calls

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 61 matching lines @@
   void cancelAnimationFrame(int id);
   void serviceScriptedAnimations(double monotonicAnimationStartTime);
 
   ScriptPromise requestPresent(ScriptState*, const HeapVector<VRLayer>& layers);
   ScriptPromise exitPresent(ScriptState*);
 
   HeapVector<VRLayer> getLayers();
 
   void submitFrame();
 
+  Document* document();
+
   DECLARE_VIRTUAL_TRACE();
 
  protected:
   friend class VRController;
 
   VRDisplay(NavigatorVR*,
             device::mojom::blink::VRDisplayPtr,
             device::mojom::blink::VRDisplayClientRequest);
 
   void update(const device::mojom::blink::VRDisplayInfoPtr&);
@@ skipping 77 matching lines @@
   ServiceInactive = 11,
   RequestDenied = 12,
   PresentationResultMax,  // Must be last member of enum.
 };
 
 void ReportPresentationResult(PresentationResult);
 
 }  // namespace blink
 
 #endif  // VRDisplay_h