Animation: Allow cubic-bezier timing inputs outside the range [0, 1] in CC

ManualTests/animation/compositor-animation-steps.html

Index: ManualTests/animation/compositor-animation-steps.html
diff --git a/ManualTests/animation/compositor-animation-steps.html b/ManualTests/animation/compositor-animation-steps.html
index 37116f811f8a1d993a80a129e0817aaa99ea0eed..3f6dca9f348ff51276490a032adc88a83f2986dd 100644
--- a/ManualTests/animation/compositor-animation-steps.html
+++ b/ManualTests/animation/compositor-animation-steps.html
@@ -17,24 +17,23 @@ same time.
 </p>
 <hr>
 
-Steps for easing timing function is set to 9
+Steps for easing timing function is set to 9.
 <br>
 <div id="test1a">MT</div>
 <div id="test1b">CT</div>
 <hr>
 
-Per-keyframe steps easing function
+Per-keyframe steps easing function (18 and 9 steps).
 <br>
 <div id="test2a">MT</div>
 <div id="test2b">CT</div>
 
-Cubic-bezier easing function combined with a step keyframe
-(FIXME: the combining of timing functions is not fully supported in CT)
+Cubic-bezier easing function combined with a step keyframe.
 <br>
 <div id="test3a">MT</div>
 <div id="test3b">CT</div>
 
-Steps easing function combined with a cubic-bezier keyframe
+Steps easing function combined with a cubic-bezier keyframe.
 <br>
 <div id="test4a">MT</div>
 <div id="test4b">CT</div>