Fix the CertDatabaseNSSTest SetUp creating multiple NSS DBs (regressed in r69107).
Fix the CertDatabaseNSSTest SetUp creating multiple NSS DBs (regressed in r69107).

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6264016

git-svn-id: http://src.chromium.org/svn/trunk/src@73366 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 849b343120e1e1622d308cf65f82171a9eda2571
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