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

device/vr/vr_device.cc

Index: device/vr/vr_device.cc
diff --git a/device/vr/vr_device.cc b/device/vr/vr_device.cc
index 00e942518dbe7075a57fa076e8e03d1b7bcf8fd1..03a968568ceba3ee70737b26934c4210e25931de 100644
--- a/device/vr/vr_device.cc
+++ b/device/vr/vr_device.cc
@@ -18,6 +18,12 @@
 }
 
 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);