Disable NetworkChangeNotifierMac's helper thread. This is so I can determine if r38052 caused the mac startup test regression. This will disable the Mac implementation of NetworkChangeNotifier, which was implemented in January and is used by the ClientSocketPool to flush idle sockets on a network change. r38052 added it to the HostResolver to flush the HostCache on a network change, which required instantiating NetworkChangeNotifierMac earlier in startup. This change will prevent the initialization of the helper thread, which will turn off network change notifications on OS X.  This is a relatively new feature, so it's fine to turn this off.  I'll let this change sit overnight and check on the startup graphs tomorrow. BUG=34926
Disable NetworkChangeNotifierMac's helper thread.
This is so I can determine if r38052 caused the mac startup test regression.
This will disable the Mac implementation of NetworkChangeNotifier, which was implemented in January and is used by the ClientSocketPool to flush idle sockets on a network change.
r38052 added it to the HostResolver to flush the HostCache on a network change, which required instantiating NetworkChangeNotifierMac earlier in startup.
This change will prevent the initialization of the helper thread, which will turn off network change notifications on OS X.  This is a relatively new feature, so it's fine to turn this off.  I'll let this change sit overnight and check on the startup graphs tomorrow.
BUG=34926

Review URL: http://codereview.chromium.org/583015

git-svn-id: http://src.chromium.org/svn/trunk/src@38418 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5eb60ab7f6c9cabd0967ee6563449799304f252c
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser