Supress a test to make the tree green

BUG=20314
TEST=none
TBR=ager

Review URL: http://codereview.chromium.org/174532

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24456 0039d316-1c4b-4281-b951-d872f2087c98

webkit/tools/layout_tests/test_expectations.txt

@@ -2828,3 +2828,6 @@ BUG20265 LINUX : LayoutTests/platform/mac/accessibility/slider-supports-actions.
 // WebKit 47759:47770.
 BUG20292 : LayoutTests/fast/forms/input-list.html = FAIL
 BUG20292 : LayoutTests/fast/forms/input-selectedoption.html = FAIL
+
+// Fails after V8 rollup
+BUG20314 MAC : LayoutTests/fast/css/only-of-type-pseudo-class.html = FAIL
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