Attempting to re-land CL 3110006 which turned out to have 
a memory leak.

Add support for speaking SSL to an HTTP Proxy, to
HttpProxyClientSocketPool (and friends)

More information about an HTTPS Proxy can be found here:

http://dev.chromium.org/spdy/spdy-proxy

This implementation supports both http:// and https:// requests,
as well as support for both Proxy and Server auth.

BUG=29625
TEST=none

Review URL: http://codereview.chromium.org/3112034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57371 0039d316-1c4b-4281-b951-d872f2087c98
13 files changed