Disable caching of failed DNS lookups.
Disable caching of failed DNS lookups.

This is causing problems on network changes, since we don't have a reliable signal for telling when DNS is back up (so we aren't able to flush the cache properly).

This will regress bug 1672, filed 46821 to address that.

BUG=46821

Review URL: http://codereview.chromium.org/2873003

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@50141 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