Fix language switch ignored changing RTL-ness.
Fix language switch ignored changing RTL-ness.

BUG=35248
TEST=Switch the language used by the ChromiumOS using the top left corner menu of the Network selection wizard. 
Or you may use the following command on desktop using Chromium (built with GYP_DEFINES="chromeos=1"): 
out/Debug/chrome --login-manager --login-screen=network

Review URL: http://codereview.chromium.org/1148003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@42143 0039d316-1c4b-4281-b951-d872f2087c98

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