wstring: simplify an rtl test
wstring: simplify an rtl test

This test is strange; it's testing a function that just inserts
a character before and after a string.  It doesn't need all the
complexity it had.

Review URL: http://codereview.chromium.org/6679035

git-svn-id: http://src.chromium.org/svn/trunk/src@77983 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 141ee223fd5d1c7c91691d35162fac8dd3ff6d06
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser