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

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

Index: third_party/WebKit/Source/modules/vr/VRDisplay.h
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplay.h b/third_party/WebKit/Source/modules/vr/VRDisplay.h
index af955c5091b8593e17a0810ed81e71b42581ee3a..500348ab9fe86ff0efc28c29d298d2be112a675d 100644
--- a/third_party/WebKit/Source/modules/vr/VRDisplay.h
+++ b/third_party/WebKit/Source/modules/vr/VRDisplay.h
@@ -116,7 +116,6 @@ class VRDisplay final : public EventTargetWithInlineData,
   VRController* controller();
 
  private:
-  void onFullscreenCheck(TimerBase*);
   void onPresentComplete(bool);
 
   void onConnected();
@@ -164,9 +163,6 @@ class VRDisplay final : public EventTargetWithInlineData,
 
   void dispose();
 
-  TaskRunnerTimer<VRDisplay> m_fullscreenCheckTimer;
-  String m_fullscreenOrigWidth;
-  String m_fullscreenOrigHeight;
   gpu::gles2::GLES2Interface* m_contextGL = nullptr;
   Member<WebGLRenderingContextBase> m_renderingContext;
 
@@ -175,7 +171,6 @@ class VRDisplay final : public EventTargetWithInlineData,
   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;