Simplify animation testing API

LayoutTests/animations/resources/animation-test-helpers.js

Index: LayoutTests/animations/resources/animation-test-helpers.js
diff --git a/LayoutTests/animations/resources/animation-test-helpers.js b/LayoutTests/animations/resources/animation-test-helpers.js
index 1a97ad8cae82e8b25fc49da42fe751dc4d3a7f1a..81f841e382ccb9cf4e0185b85cede7318b7cc066 100644
--- a/LayoutTests/animations/resources/animation-test-helpers.js
+++ b/LayoutTests/animations/resources/animation-test-helpers.js
@@ -18,7 +18,7 @@ Function parameters:
     - the tolerance to use when comparing the effective CSS property value with its expected value
 
     [1] If null is passed, a regular setTimeout() will be used instead to snapshot the animated property in the future,
-    instead of fast forwarding using the pauseAnimationAtTimeOnElement() JS API from Internals.
+    instead of fast forwarding using the pauseAnimations() JS API from Internals.

[Steve Block, 2013/05/06 01:49:06]

It looks like the animation name is still used to enforce this, but is there any
need to do so? Can we remove the name (either now, or with a FIXME)?

[dstockwell, 2013/05/06 04:01:00]

Not passing a name no longer falls back to the setTimeout version. Added a fixme
to remove this argument.

     
     [2] If a single string is passed, it is the id of the element to test. If an array with 2 elements is passed they
     are the ids of 2 elements, whose values are compared for equality. In this case the expected value is ignored
@@ -240,15 +240,8 @@ function checkExpectedValue(expected, index)
         }
     }
 
-    if (animationName && hasPauseAnimationAPI && !internals.pauseAnimationAtTimeOnElement(animationName, time, document.getElementById(elementId))) {
-        result += "FAIL - animation \"" + animationName + "\" is not running" + "<br>";
-        return;
-    }
-    
-    if (compareElements && !element2Static && animationName && hasPauseAnimationAPI && !internals.pauseAnimationAtTimeOnElement(animationName, time, document.getElementById(elementId2))) {
-        result += "FAIL - animation \"" + animationName + "\" is not running" + "<br>";
-        return;
-    }
+    if (animationName && hasPauseAnimationAPI)
+        internals.pauseAnimations(time);
     
     var computedValue, computedValue2;
     if (compareElements) {
@@ -386,12 +379,9 @@ function startTest(expected, callback)
     var maxTime = 0;
 
     for (var i = 0; i < expected.length; ++i) {
-        var animationName = expected[i][0];
         var time = expected[i][1];
 
-        // We can only use the animation fast-forward mechanism if there's an animation name
-        // and Internals implements pauseAnimationAtTimeOnElement()
-        if (animationName && hasPauseAnimationAPI)
+        if (hasPauseAnimationAPI)
             checkExpectedValue(expected, i);
         else {
             if (time > maxTime)