Revert 67614 - Support predictive request for multiple preconnections

Connected up to the API for requesting more than
one preconnect at a time (that API also explicitly
tags requsets as preconnects, so that they can be
merged with actual navication requests).

BUG=64246
r=willchan,mbelshe
Review URL: http://codereview.chromium.org/5271002

[email protected]
Review URL: http://codereview.chromium.org/5397003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@67622 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed