Re-land^2 WebVR compositor bypass via BrowserMain context + mailbox

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 98 matching lines @@
 
   void beginPresent();
   void forceExitPresent();
 
   void updateLayerBounds();
   void disconnected();
 
   VRController* controller();
 
  private:
-  void onFullscreenCheck(TimerBase*);
   void onPresentComplete(bool);
 
   void onConnected();
   void onDisconnected();
 
   void stopPresenting();
 
   void OnPresentChange();
 
   // VRDisplayClient
@@ skipping 27 matching lines @@
   // This frame ID is vr-specific and is used to track when frames arrive at the
   // VR compositor so that it knows which poses to use, when to apply bounds
   // updates, etc.
   int16_t m_vrFrameId = -1;
   VRLayer m_layer;
   double m_depthNear = 0.01;
   double m_depthFar = 10000.0;
 
   void dispose();
 
-  TaskRunnerTimer<VRDisplay> m_fullscreenCheckTimer;
-  String m_fullscreenOrigWidth;
-  String m_fullscreenOrigHeight;
   gpu::gles2::GLES2Interface* m_contextGL = nullptr;
   Member<WebGLRenderingContextBase> m_renderingContext;
 
   Member<ScriptedAnimationController> m_scriptedAnimationController;
   bool m_pendingRaf = false;
   bool m_pendingVsync = false;
   bool m_inAnimationFrame = false;
   bool m_displayBlurred = false;
-  bool m_reenteredFullscreen = false;
   double m_timebase = -1;
 
   device::mojom::blink::VRDisplayPtr m_display;
 
   mojo::Binding<device::mojom::blink::VRDisplayClient> m_displayClientBinding;
   device::mojom::blink::VRVSyncProviderPtr m_vrVSyncProvider;
 
   HeapDeque<Member<ScriptPromiseResolver>> m_pendingPresentResolvers;
 };
 
@@ skipping 15 matching lines @@
   RequestDenied = 12,
   FullscreenNotEnabled = 13,
   PresentationResultMax,  // Must be last member of enum.
 };
 
 void ReportPresentationResult(PresentationResult);
 
 }  // namespace blink
 
 #endif  // VRDisplay_h