Documentation update.

Bug: skia:
Change-Id: I768a4e90dc1fa0ca6ca339de446218e489e5a436
Reviewed-on: https://skia-review.googlesource.com/147640
Reviewed-by: Allan MacKinnon <allanmac@google.com>
Commit-Queue: Allan MacKinnon <allanmac@google.com>
Auto-Submit: Allan MacKinnon <allanmac@google.com>
2 files changed