GitLab

This CL converts XRPresentationClientPtr in chrome, device and
blink to the new Mojo type, and uses
pending_receiver<XRPresentationClient> in vr_service.mojom.

Bug: 955171, 978694
Change-Id: I2ea508b31be493653edd2301758855b8c63efc79
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1828724Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Piotr Bialecki <bialpio@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Klaus Weidner <klausw@chromium.org>
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Cr-Commit-Position: refs/heads/master@{#702283}