Revert "Revert "Rebuild test history databases when starting up performance_ui_tests.""

This reverts the revert and puts the performance_ui_tests fix in the tree. It
will still break on the Windows XP dbg 2 performance bot, but this is for the
infrastructure people to see what's going on there.

BUG=111570

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200330 0039d316-1c4b-4281-b951-d872f2087c98
41 files changed