Addressed review comments for recipe documentation update.
Addressed review comments for recipe documentation update.

R=iannucci@chromium.org,pgervais@chromium.org
BUG=500765

Review URL: https://codereview.chromium.org/1191933005

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@295749 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build