Don't require getPropertyCSSValue in svg number animation tests

LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js

Index: LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js
diff --git a/LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js b/LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js
index 6e142612ee740e013533471fce0e0f454a1b22a5..6b1d49d942ae729bce96f4b6e63da68b9f00c58c 100644
--- a/LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js
+++ b/LayoutTests/svg/animations/script-tests/svgnumber-animation-3.js
@@ -22,26 +22,18 @@ rect.appendChild(animate);
 rootSVGElement.appendChild(rect);
 
 // Setup animation test
-function sample1() {
+function sample() {
     // Check initial/end conditions
-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
-}
-
-function sample2() {
-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
-}
-
-function sample3() {
-    shouldBe("getComputedStyle(rect).getPropertyCSSValue('opacity').getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "0");
+    shouldBe("getComputedStyle(rect).opacity", "'0'");
 }
 
 function executeTest() {
     const expectedValues = [
         // [animationId, time, sampleCallback]
-        ["animation", 0.0,   sample1],
-        ["animation", 2.0,   sample2],
-        ["animation", 3.999, sample3],
-        ["animation", 4.001, sample1]
+        ["animation", 0.0,   sample],
+        ["animation", 2.0,   sample],
+        ["animation", 3.999, sample],
+        ["animation", 4.001, sample]
     ];
 
     runAnimationTest(expectedValues);