Simplify animation testing API

LayoutTests/transitions/resources/transition-test-helpers.js

 /* This is the helper function to run transition tests:
 
 Test page requirements:
 - The body must contain an empty div with id "result"
 - Call this function directly from the <script> inside the test page
 
 Function parameters:
     expected [required]: an array of arrays defining a set of CSS properties that must have given values at specific times (see below)
     callback [optional]: a function to be executed just before the test starts (none by default)
     
@@ skipping 218 matching lines @@
         if (!property.indexOf("-webkit-transform."))
             property = "-webkit-transform";
 
         var tryToPauseTransition = expected[i][6];
         if (tryToPauseTransition === undefined)
           tryToPauseTransition = shouldBeTransitioning;
 
         if (hasPauseTransitionAPI && usePauseAPI) {
             if (tryToPauseTransition) {
               var element = document.getElementById(elementId);
-              if (!internals.pauseTransitionAtTimeOnElement(property, time, element))
-                window.console.log("Failed to pause '" + property + "' transition on element '" + elementId + "'");
+              internals.pauseAnimations(time);
             }
             checkExpectedValue(expected, i);
         } else {
             if (time > maxTime)
                 maxTime = time;
 
             window.setTimeout(checkExpectedValueCallback(expected, i), time * 1000);
         }
     }
 
@@ skipping 36 matching lines @@
         if (!doPixelTest)
             testRunner.dumpAsText();
         testRunner.waitUntilDone();
     }
     
     if (!expected)
         throw("Expected results are missing!");
     
     window.addEventListener("load", function() { startTest(expected, usePauseAPI, callback); }, false);
 }