Remove event_channel() and control_channel() from Session interface.

Now all channels are created using CreateStreamChannel() as they should be!

Review URL: http://codereview.chromium.org/8587053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111045 0039d316-1c4b-4281-b951-d872f2087c98
34 files changed