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

device/vr/vr_display_impl_unittest.cc

 // 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.
 
 #include "device/vr/vr_display_impl.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "device/vr/test/fake_vr_device.h"
@@ skipping 29 matching lines @@
     clients_.push_back(new FakeVRServiceClient(mojo::MakeRequest(&proxy)));
 
     auto service = base::WrapUnique(new VRServiceImpl());
     service->SetClient(std::move(proxy),
                        base::Bind(&VRDisplayImplTest::onDisplaySynced,
                                   base::Unretained(this)));
     return service;
   }
 
   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(); }
 
   void TearDown() override { base::RunLoop().RunUntilIdle(); }
 
   VRDevice* device() { return device_; }
 
   bool presenting() { return !!device_->presenting_display_; }
 
@@ skipping 53 matching lines @@
   auto service_2 = BindService();
 
   device()->OnChanged();
 
   base::RunLoop().RunUntilIdle();
 
   for (auto* client : clients_)
     EXPECT_TRUE(client->CheckDeviceId(device()->id()));
 }
 }