Remove property-specific handling in animation-test-helpers.js

LayoutTests/animations/change-transform-style-during-animation.html

Index: LayoutTests/animations/change-transform-style-during-animation.html
diff --git a/LayoutTests/animations/change-transform-style-during-animation.html b/LayoutTests/animations/change-transform-style-during-animation.html
index d4b17f249fc21bd54e755feeebfa08ef5ef8397f..d0f5d9ed3ad2bb81e91fd48c6d4f48afe11fb95e 100644
--- a/LayoutTests/animations/change-transform-style-during-animation.html
+++ b/LayoutTests/animations/change-transform-style-during-animation.html
@@ -45,9 +45,9 @@
      {
        var animated = document.getElementById('animated');
        var result;
-       var expected = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -200, 0, 200, 1];
+       var expected = "matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -200, 0, 200, 1)";
        var computed = getPropertyValue("webkitTransform", "animated");
-       if (comparePropertyValue("webkitTransform", computed, expected, 0.002)) {
+       if (comparePropertyValue(computed, expected, 0.002)) {
          result = "PASS - Computed final position is correct.";
        } else {
          result = "FAIL - Computed final position is incorrect. Expected " + expected + ", got " + computed;