Fix DCHECK when loading chrome://net-internals
Fix DCHECK when loading chrome://net-internals

TEST=visit chrome://net-internals and [::1] in a debug build, it shouldn't crash
BUG=NONE

Review URL: http://codereview.chromium.org/3359006

git-svn-id: http://src.chromium.org/svn/trunk/src@58535 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: a578cf68e00af3bf3235abf0df29403c3e8a6bd0
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