Test for Blink bug 228870: CSS parser incorrectly handles invalid @keyframes key values

Test 1 failed (INTEGER single key)

Test 2 failed (INTEGER in a key list)

Test 3 failed (unknown IDENT in a key list)

Test 4 failed (out-of-range percentage key value in a key list)

Test 5 failed (key list with no block)

Test 6 failed (no key list)

Test 7 failed (no declaration block)

Test 8 failed (handling invalid perentheses block)