Nukes PrefServiceUITest file deletion code in favor of DieFileDie, which I suspect is causing purify ui test flakeyness.
Nukes PrefServiceUITest file deletion code in favor of DieFileDie,
which I suspect is causing purify ui test flakeyness.

BUG=6557
TEST=none

Review URL: http://codereview.chromium.org/20439

git-svn-id: http://src.chromium.org/svn/trunk/src@9920 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: f9908b2a9ff136ac1fb8124337d93b82e7a9d994
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