Revert of WebVR compositor bypass via BrowserMain context + mailbox

device/vr/vr_device.cc

 // Copyright 2015 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_device.h"
 #include "device/vr/vr_device_provider.h"
 #include "device/vr/vr_display_impl.h"
 
 namespace device {
 
 unsigned int VRDevice::next_id_ = 1;
 
 VRDevice::VRDevice()
     : presenting_display_(nullptr), id_(next_id_), weak_ptr_factory_(this) {
   // Prevent wraparound. Devices with this ID will be treated as invalid.
   if (next_id_ != VR_DEVICE_LAST_ID)
     next_id_++;
 }
 
 VRDevice::~VRDevice() {}
 
+void VRDevice::RequestPresent(const base::Callback<void(bool)>& callback) {
+  callback.Run(true);
+}
+
+void VRDevice::SetSecureOrigin(bool secure_origin) {}
+
 void VRDevice::AddDisplay(VRDisplayImpl* display) {
   displays_.insert(display);
 }
 
 void VRDevice::RemoveDisplay(VRDisplayImpl* display) {
   if (CheckPresentingDisplay(display))
     ExitPresent();
   displays_.erase(display);
 }
 
@@ skipping 45 matching lines @@
 void VRDevice::OnDeactivate(mojom::VRDisplayEventReason reason) {
   for (auto* display : displays_)
     display->client()->OnDeactivate(reason);
 }
 
 void VRDevice::SetPresentingDisplay(VRDisplayImpl* display) {
   presenting_display_ = display;
 }
 
 }  // namespace device