Update codesearch docs.

BUG=skia:

NOTRY=true
DOCS_PREVIEW= https://skia.org/?cl=8321

Change-Id: Ia8c87fbb3b2380c18d27bffbbd060a0d77194f7d
Reviewed-on: https://skia-review.googlesource.com/8321
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
1 file changed