Tear down service IPC channel before creating a new one.
Tear down service IPC channel before creating a new one.

BUG=74820
TEST=Start Chrome and enable Chromoting.  Restart Chromer and open Preferences, and check that Remoting is correctly detected as enabled.

Review URL: http://codereview.chromium.org/6612028

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@76903 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser