Currently the only property we manage is whether or not a server supports SPDY, as indicated by NPN. Also introduce a chrome/ implementation of HttpServerPropertiesManager that persists the information to Prefererences.
When we get a SpdySession for a SPDY server, record that that server supports SPDY in HttpServerPropertiesManager. When preconnecting, if we know that the server supports SPDY, only preconnect 1 socket.
R=willchan
BUG=66472
TEST=browser ui and unit tests,network unit tests
Review URL: http://codereview.chromium.org/7827033
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@104666 0039d316-1c4b-4281-b951-d872f2087c98