[SVG2] Add support for marker orient="auto-start-reverse".

LayoutTests/svg/animations/script-tests/animate-marker-orient-from-auto-to-auto-start-reverse.js

-description("Animate SVGMarkerElement orientAttr from an angle to auto");
+description("Animate SVGMarkerElement orientAttr from auto to auto-start-reverse");
 createSVGTestCase();
 
 // Setup test document
 
 var marker = createSVGElement("marker");
 marker.setAttribute("id", "marker");
 marker.setAttribute("viewBox", "0 0 10 10");
 marker.setAttribute("markerWidth", "2");
 marker.setAttribute("markerHeight", "2");
 marker.setAttribute("refX", "5");
@@ skipping 19 matching lines @@
 path.setAttribute("marker-end", "url(#marker)");
 path.setAttribute("d", "M 130 135 L 180 135 L 180 185");
 path.setAttribute("transform", "translate(-130, -120)");
 rootSVGElement.appendChild(path);
 
 var animate1 = createSVGElement("animate");
 animate1.setAttribute("id", "animation");
 animate1.setAttribute("attributeName", "orient");
 animate1.setAttribute("begin", "path.click");
 animate1.setAttribute("dur", "4s");
-animate1.setAttribute("from", "90deg");
-animate1.setAttribute("to", "auto");
+animate1.setAttribute("from", "auto");
+animate1.setAttribute("to", "auto-start-reverse");
 animate1.setAttribute("fill", "freeze");
 marker.appendChild(animate1);
 
 // Setup animation test
 function sample1() {
     shouldBeCloseEnough("marker.orientAngle.animVal.value", "0");
     shouldBe("marker.orientAngle.baseVal.value", "0");
 
     shouldBe("marker.orientType.animVal", "SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE");
     shouldBe("marker.orientType.baseVal", "SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE");
 }
 
 function sample2() {
-    shouldBeCloseEnough("marker.orientAngle.animVal.value", "90");
+    shouldBeCloseEnough("marker.orientAngle.animVal.value", "0");
     shouldBe("marker.orientAngle.baseVal.value", "0");
 
-    shouldBe("marker.orientType.animVal", "SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE");
+    shouldBe("marker.orientType.animVal", "SVGMarkerElement.SVG_MARKER_ORIENT_AUTO");
     shouldBe("marker.orientType.baseVal", "SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE");
 }
 
 function sample3() {
     shouldBeCloseEnough("marker.orientAngle.animVal.value", "0");
     shouldBe("marker.orientAngle.baseVal.value", "0");
 
-    shouldBe("marker.orientType.animVal", "SVGMarkerElement.SVG_MARKER_ORIENT_AUTO");
+    shouldBe("marker.orientType.animVal", "SVGMarkerElement.SVG_MARKER_ORIENT_UNKNOWN");
     shouldBe("marker.orientType.baseVal", "SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE");
 }
 
 function executeTest() {
     const expectedValues = [
         // [animationId, time, sampleCallback]
         ["animation", 0.0,   sample1],
         ["animation", 0.001, sample2],
         ["animation", 1.999, sample2],
         ["animation", 2.001, sample3],
         ["animation", 3.999, sample3],
         ["animation", 4.001, sample3]
     ];
 
     runAnimationTest(expectedValues);
 }
 
 var successfullyParsed = true;