Fix bug in SetVRDisplayInfo

BUG=848092

Change-Id: Icd1ff5e9929f6bed9c7ff657dbcc8a75b39feb35
Reviewed-on: https://chromium-review.googlesource.com/1079806Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563132}

device/vr/vr_device_base.cc

@@ -116,7 +116,7 @@ void VRDeviceBase::SetVRDisplayInfo(mojom::VRDisplayInfoPtr display_info) {
     return;
 
   if (listener_)
-    listener_->OnChanged(display_info.Clone());
+    listener_->OnChanged(display_info_.Clone());
 }
 
 void VRDeviceBase::OnActivate(mojom::VRDisplayEventReason reason,