Fix for previous change using the wrong "revision" var.
Fix for previous change using the wrong "revision" var.

TBR=amineer@google.com
BUG=406955

Review URL: https://codereview.chromium.org/505303003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@291654 0039d316-1c4b-4281-b951-d872f2087c98

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