(nit) Update comments in cc::Layer

Fix comments that were missed in the original patch.

TBR=enne

Bug: 903486
Change-Id: I28132b25e95141cf56663300a46e92299c9df8af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1502352
Reviewed-by: Malay Keshav <malaykeshav@chromium.org>
Commit-Queue: Malay Keshav <malaykeshav@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637614}
1 file changed