GitLab

Updated an error message string to more accurately describe the WebXR
state needed to satisfy it, removed a couple of WebGL helper methods
that were only being called by WebVR previously, and removed a Gamepad
enum from the IDL that was WebVR-specific.

Bug: 1030470
Change-Id: I6a4a53240f761eed94100dd374c4504f28a99b98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949298Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Brandon Jones <bajones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721274}