Unreviewed gardening.
Remove entry for bidi-layout-across-linebreak.html, reinstated meter-optimiums.html as flaky on Mac.

* platform/chromium/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk/LayoutTests@130157 268f45cc-cd09-0410-ab3c-d52691b4dbfc