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We could convert these tests to use manifest_version 2, but it's not worth the
effort.  (After this patch, I believe all the tests will pass when we require
manifest_version 2 for unpacked extensions.)

BUG=62897
Review URL: http://codereview.chromium.org/8864002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113520 0039d316-1c4b-4281-b951-d872f2087c98