Don't require getPropertyCSSValue in svg tests

LayoutTests/svg/animations/script-tests/animate-color-rgba-calcMode-discrete.js

 description("Test calcMode discrete with from-to animation on colors with alpha channel. You should see a green 100x100 rect and only PASS messages");
 createSVGTestCase();
 
 // Setup test document
 var rect = createSVGElement("rect");
 rect.setAttribute("id", "rect");
 rect.setAttribute("width", "100");
 rect.setAttribute("height", "100");
 rect.setAttribute("color", "rgba(0,255,255, 0.4)");
 rect.setAttribute("fill", "currentColor");
 rect.setAttribute("onclick", "executeTest()");
 
 var animate = createSVGElement("animate");
 animate.setAttribute("id", "animation");
 animate.setAttribute("attributeName", "color");
 animate.setAttribute("from", "rgba(255,0,0,0.6)");
 animate.setAttribute("to", "rgba(0,255,255,0.8)");
 animate.setAttribute("begin", "click");
 animate.setAttribute("dur", "4s");
 animate.setAttribute("calcMode", "discrete");
 rect.appendChild(animate);
 rootSVGElement.appendChild(rect);
 
-function parseAlphaFromColor() {
-    // As alpha is not exposed via CSS OM, we have to parse it from the color string, to be able
-    // to use shouldBeCloseEnough() - otherwise we can't allow tolerances, and this test is flaky.
-    colorString = getComputedStyle(rect).getPropertyValue('color');
-    return colorString.replace(/rgba.*\,/, "").replace(/\)$/, "");
-}
-
 function expectRGBAColor(red, green, blue, alpha) {
-    rgbColor = getComputedStyle(rect).getPropertyCSSValue('color').getRGBColorValue();
-    shouldBeCloseEnough("rgbColor.red.getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "" + red, 1);
-    shouldBeCloseEnough("rgbColor.green.getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "" + green, 1);
-    shouldBeCloseEnough("rgbColor.blue.getFloatValue(CSSPrimitiveValue.CSS_NUMBER)", "" + blue, 1);
-    shouldBeCloseEnough("parseAlphaFromColor()", "" + alpha, 0.1);
+    colors = getComputedStyle(rect).color.replace("rgba(", "").replace(")", "").split(",");
+    shouldBeCloseEnough("colors[0]", "" + red, 1);
+    shouldBeCloseEnough("colors[1]", "" + green, 1);
+    shouldBeCloseEnough("colors[2]", "" + blue, 1);
+    shouldBeCloseEnough("colors[3]", "" + alpha, 0.1);
 }
 
 // Setup animation test
 function sample1() {
     expectRGBAColor(255, 0, 0, 0.6);
 }
 
 function sample2() {
     expectRGBAColor(0, 255, 255, 0.8);
 }
@@ skipping 10 matching lines @@
         ["animation", 1.0,   sample1],
         ["animation", 3.0,   sample2],
         ["animation", 3.999, sample2],
         ["animation", 4.001, sample3]
     ];
 
     runAnimationTest(expectedValues);
 }
 
 var successfullyParsed = true;