GitLab

webapp_build.py wasn't updated properly in r278198. As result main.html
wasn't properly package in the webapp.

TBR=wez@chromium.org
BUG=134215

Review URL: https://codereview.chromium.org/344753002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278218 0039d316-1c4b-4281-b951-d872f2087c98