Don't resolve IP literals.

For each resolution request this checks to see if this 'host' is a literal ip address.  If so, it synthesises a struct addrinfo and returns it without adding it to the cache.

BUG=39830
TEST=unit tests, new and old

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=56384

Review URL: http://codereview.chromium.org/3023048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56615 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed