Language options: make language list narrower to fix overflowing problem on RTL.
Before this change, the language options was wider than the enclosing
"subpage-sheet-contents" div. For LTR layouts, it's acceptable because it
overflows to the right into nothing, but on RTL it still overflows to the
right, causing the bad effect seen in the bug.
BUG=chromium-os:24943
TEST=set UI language to Arabic, verify the language list doesn't overflow outside the language settings pane
Review URL: http://codereview.chromium.org/
9173004
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@117827 0039d316-1c4b-4281-b951-d872f2087c98