Implement install module verification metric.

BUG=297675
NOTRY=True

Review URL: https://codereview.chromium.org/23513049

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227542 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227542