chromeos: Fix UpdateScreenTest.NoUpdate and TestUpdateAvailable

The tests were broken by crrev.com/107308
status() is not called in UpdateStatusChanged() in most cases
as we now pass status instead of the update library, but
it's still called when ExitUpdate() is called from
UpdateStatusChanged().

TEST=out/Release/browser_tests --gtest_filter=UpdateScreenTest.*
BUG=chromium-os:16564

Review URL: http://codereview.chromium.org/8399006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107493 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed