Using urllib for SSL connections when behind a proxy is known to be
broken.

Upstream has fixed this in urllib2 in Python 2.6.3 and newer so
replace uses of urllib for SSL connections with urllib2 methods.

R=maruel@chromium.org
BUG=134165
TEST=gclient sync behind corporate proxy. Submitting this CL with git_cl.


Review URL: https://chromiumcodereview.appspot.com/10825107

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@149742 0039d316-1c4b-4281-b951-d872f2087c98