Convert XRSessionController to new Mojo types

This CL converts XRSessionController{Ptr, Request} in chrome and
device to the new Mojo type, and use
pending_remote<XRSessionController> in isolated_xr_service.mojom.

This CL also remove unnecessary InterfaceSet and it is replaced
with RemoteSet.

Bug: 955171, 965668
Change-Id: I388f1be9010b6c91a0f1fa00bfc719accd457f66
Commit-Queue: Miyoung Shin <>
Reviewed-by: Sam McNally <>
Reviewed-by: Klaus Weidner <>
Reviewed-by: Piotr Bialecki <>
Reviewed-by: Ken Rockot <>
Cr-Commit-Position: refs/heads/master@{#704562}
28 files changed