Following tests failing for animation of the left property with four different fill modes with error message :

FAIL - end of animation - id: c expected: 300 actual: 200

 
RULE "animations/animation-direction-reverse-fill-mode.html" any any

RULE "animations/animation-events-create.html" any any

RULE "animations/change-keyframes.html" any any

RULE "animations/fill-mode-iteration-count-non-integer.html" any any

RULE "animations/fill-mode-reverse.html" any any

RULE "animations/keyframes-rule.html" any any

RULE "animations/lineheight-animation.html" any any

RULE "animations/width-using-ems.html" any any