Re-land^2 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 03a968568ceba3ee70737b26934c4210e25931de..00e942518dbe7075a57fa076e8e03d1b7bcf8fd1 100644
--- a/device/vr/vr_device.cc
+++ b/device/vr/vr_device.cc
@@ -19,12 +19,6 @@ VRDevice::VRDevice()
 
 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);
 }