Get more info in the logs when ErrorPageTest fails.
Get more info in the logs when ErrorPageTest fails.

TEST=none
BUG=19361

Review URL: http://codereview.chromium.org/199076

git-svn-id: http://src.chromium.org/svn/trunk/src@25875 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0ab1075ce326cff2b76e8194dfafc85067b36066
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser