Fix About box truncation in some locales when new version is available.
BUG=
21615
TEST=The words "A new version of Google Chrome is available" should not appear truncated in the About box in any locales. These are the ones I touched with this change: bg, bn, ca, cs, de, el, en-US, en-GB, es, es-419, et, fil, fr, gu, hr, it, ja, lv, ml, nl, no, pl, pt-BR, pt-PT, ro, ru, sk, sl, sr, sv, ta, te, vi.
Committed:
http://src.chromium.org/viewvc/chrome?view=rev&revision=26041