Add a couple options for potential labels for random wallpaper selection.
Add a couple options for potential labels for random wallpaper selection.

Adding a few potential strings just in case we decide we want to pull the feature for choosing a random wallpaper back to M19.

BUG=120217
TEST=


Review URL: http://codereview.chromium.org/9864002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@129037 0039d316-1c4b-4281-b951-d872f2087c98

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