Use Connecting() instead of !Connected() in VPN cert UI
Use Connecting() instead of !Connected() in VPN cert UI

Change-Id: I04d3245aba9bd4142a0d56d135b31da0ee24d9f3

BUG=chromium-os:24593
TEST=See issue

Review URL: http://codereview.chromium.org/9072013

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@116883 0039d316-1c4b-4281-b951-d872f2087c98

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