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

device/vr/vr_display_impl.h

Index: device/vr/vr_display_impl.h
diff --git a/device/vr/vr_display_impl.h b/device/vr/vr_display_impl.h
index 7116d520d1ad314bf74976376696bcbaec2824b2..bf0b7ab128e9554b26280e7caec6557c5478a2e9 100644
--- a/device/vr/vr_display_impl.h
+++ b/device/vr/vr_display_impl.h
@@ -32,13 +32,17 @@ class VRDisplayImpl : public mojom::VRDisplay {
   void ResetPose() override;
 
   void RequestPresent(bool secure_origin,
+                      mojom::VRSubmitFrameClientPtr submit_client,
                       const RequestPresentCallback& callback) override;
   void ExitPresent() override;
-  void SubmitFrame(mojom::VRPosePtr pose) override;
+  void SubmitFrame(int16_t frame_index,
+                   const gpu::MailboxHolder& mailbox) override;
 
   void UpdateLayerBounds(int16_t frame_index,
                          mojom::VRLayerBoundsPtr left_bounds,
-                         mojom::VRLayerBoundsPtr right_bounds) override;
+                         mojom::VRLayerBoundsPtr right_bounds,
+                         int16_t source_width,
+                         int16_t source_height) override;
   void GetVRVSyncProvider(mojom::VRVSyncProviderRequest request) override;
 
   void RequestPresentResult(const RequestPresentCallback& callback,