Revert of Re-land WebVR compositor bypass via BrowserMain context + mailbox

device/vr/vr_display_impl_unittest.cc

Index: device/vr/vr_display_impl_unittest.cc
diff --git a/device/vr/vr_display_impl_unittest.cc b/device/vr/vr_display_impl_unittest.cc
index 05cad2f2d9709851a7f7ac276d03e358e960e8ba..f53fde62b7e5aa8bea29bb27bc0aeb26c6a5940e 100644
--- a/device/vr/vr_display_impl_unittest.cc
+++ b/device/vr/vr_display_impl_unittest.cc
@@ -47,14 +47,9 @@
   }
 
   void RequestPresent(VRDisplayImpl* display_impl) {
-    // TODO(klausw,mthiesse): set up a VRSubmitFrameClient here? Currently,
-    // the FakeVRDisplay doesn't access the submit client, so a nullptr
-    // is ok.
-    device::mojom::VRSubmitFrameClientPtr submit_client = nullptr;
     display_impl->RequestPresent(
-        true, std::move(submit_client),
-        base::Bind(&VRDisplayImplTest::onPresentComplete,
-                   base::Unretained(this)));
+        true, base::Bind(&VRDisplayImplTest::onPresentComplete,
+                         base::Unretained(this)));
   }
 
   void ExitPresent(VRDisplayImpl* display_impl) { display_impl->ExitPresent(); }