Assigning to M66, since it would be nice to fix before people start using the Oculus runtime flag.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/59820dfe65b5e5b783a3ac4112cc5b713c5204f7

commit 59820dfe65b5e5b783a3ac4112cc5b713c5204f7
Author: Bill Orr <billorr@chromium.org>
Date: Sat Feb 24 02:08:45 2018

Correctly handle Oculus SRGB

Oculus wants submitted textures to be in SRGB format. WebGL is rendering
linear color space, so we need to convert.

Bug:  812408 
Change-Id: I25fc2ca95a62ec95ef7773c17ad2001910a845e5
Reviewed-on: https://chromium-review.googlesource.com/935494
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538967}
[modify] https://crrev.com/59820dfe65b5e5b783a3ac4112cc5b713c5204f7/device/vr/oculus/oculus_device_provider.cc
[modify] https://crrev.com/59820dfe65b5e5b783a3ac4112cc5b713c5204f7/device/vr/oculus/oculus_device_provider.h
[modify] https://crrev.com/59820dfe65b5e5b783a3ac4112cc5b713c5204f7/device/vr/oculus/oculus_render_loop.cc
[modify] https://crrev.com/59820dfe65b5e5b783a3ac4112cc5b713c5204f7/device/vr/oculus/oculus_render_loop.h
[modify] https://crrev.com/59820dfe65b5e5b783a3ac4112cc5b713c5204f7/device/vr/windows/d3d11_texture_helper.cc