Ensure navigator.getVRDisplays always resolves.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index ef14c8360cf0d7bea2c163f1ed6a9a5496d96fa9..5a93e6115a95badafdc7b6d19cd798f620225097 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -124,9 +124,7 @@
 #include "content/browser/frame_host/popup_menu_helper_mac.h"
 #endif
 
-#if defined(ENABLE_WEBVR)
 #include "device/vr/vr_service_impl.h"  // nogncheck
-#endif
 
 using base::TimeDelta;
 
@@ -238,6 +236,11 @@ class RemoterFactoryImpl final : public media::mojom::RemoterFactory {
 };
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)
 
+template <typename Interface>
+void IgnoreInterfaceRequest(mojo::InterfaceRequest<Interface> request) {
+  // Intentionally ignore the interface request.
+}
+
 }  // namespace
 
 // static
@@ -2271,7 +2274,11 @@ void RenderFrameHostImpl::RegisterMojoInterfaces() {
 #if defined(ENABLE_WEBVR)
   GetInterfaceRegistry()->AddInterface<device::mojom::VRService>(
       base::Bind(&device::VRServiceImpl::Create));
+#else
+  GetInterfaceRegistry()->AddInterface<device::mojom::VRService>(
+      base::Bind(&IgnoreInterfaceRequest<device::mojom::VRService>));
 #endif
+
   if (base::FeatureList::IsEnabled(features::kGenericSensor)) {
     GetInterfaceRegistry()->AddInterface(
         base::Bind(&device::SensorProviderImpl::Create,