Change a DCHECK to a DCHECK_LT so we can see the failing values.
Change a DCHECK to a DCHECK_LT so we can see the failing values.

This DCHECK sometimes fails on the bots; seeing the failing values may help
us diagnose the problem.

BUG=50556

Review URL: http://codereview.chromium.org/3068010

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@54069 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser