Fix documentation of graphics layer names.

TBR=schenney@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Ia5ce468c1c52220e0f8e91c303a50c0721981c99
Reviewed-on: https://chromium-review.googlesource.com/770105
Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516577}
1 file changed