The http/tests/cache/disk-cache-redirect-to-data.html layout test is failing since it was added on r180148 (https://trac.webkit.org/changeset/180148)
The following diff:
@@ -3,7 +3,7 @@
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-PASS success is true
+FAIL success should be true. Threw exception ReferenceError: Can't find variable: success
PASS successfullyParsed is true
*** This bug has been marked as a duplicate of bug 142821 ***