net: fix leak in SSLHostInfo's DNS request.
net: fix leak in SSLHostInfo's DNS request.

I'm too used to callbacks which delete themselves and forgot to delete
it myself in r70631.

BUG=68820
TEST=valgrind

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@70737 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