Really fix chromium-os:14180 this time.
Really fix chromium-os:14180 this time.

Add the device change property manager in the correct branch
of the if statement.

BUG=chromium-os:14180
TEST=Bring up the cellular device tab, and see that it is now
populated with actual values instead of being blank.

R=stevenjb@chromium.org

Review URL: http://codereview.chromium.org/7011023

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@85338 0039d316-1c4b-4281-b951-d872f2087c98

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