[SVG] animateMotion accumulate doesn't work properly with rotate: auto / auto-reverse

LayoutTests/svg/animations/animateMotion-accumulate-2a.svg

Index: LayoutTests/svg/animations/animateMotion-accumulate-2a.svg
diff --git a/LayoutTests/svg/animations/animateMotion-accumulate-2a.svg b/LayoutTests/svg/animations/animateMotion-accumulate-2a.svg
new file mode 100755
index 0000000000000000000000000000000000000000..2dd08e2f782b2e3a65be257c910d69ada750c24b
--- /dev/null
+++ b/LayoutTests/svg/animations/animateMotion-accumulate-2a.svg
@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="iso-8859-1" ?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG Tiny 1.1//EN"
+"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd">
+<svg viewBox="0 0 500 350" onload="loaded()"
+  xmlns="http://www.w3.org/2000/svg" version="1.1" baseProfile="tiny"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+  <g id="test-body-content" font-family="SVGFreeSansASCII,sans-serif" font-size="18">
+    <rect x="0" y="0" width="480" height="360" fill="#fff" />
+    <g transform="translate(40,-20) scale(0.45)">
+      <g>
+        <circle cx="0" cy="0" r="70" fill="#f00">
+          <animateMotion
+            dur="4s"
+            path="M100,100c0,200 200,200 200,0"
+            repeatDur="8s"
+            accumulate="sum"
+            fill="freeze" />
+        </circle>
+        <circle cx="0" cy="0" r="60"
+        stroke="#00f" stroke-width="21"
+        fill="#f00">
+          <animateMotion
+            dur="4s"
+            path="M100,100c0,200 200,200 200,0"
+            repeatDur="8s"
+            accumulate="sum"
+            rotate="auto"
+            fill="freeze" />
+        </circle>
+        <circle cx="0" cy="0" r="40"
+        stroke="#00f" stroke-width="21"
+        fill="#f00">
+          <animateMotion
+            dur="4s"
+            path="M100,100c0,200 200,200 200,0"
+            repeatDur="8s"
+            accumulate="sum"
+            rotate="auto-reverse"
+            fill="freeze" />
+        </circle>
+        <circle cx="0" cy="0" r="20"
+        stroke="#00f" stroke-width="21"
+        fill="#f00">
+          <animateMotion
+            dur="4s"
+            path="M100,100c0,200 200,200 200,0"
+            repeatDur="8s"
+            accumulate="sum"
+            rotate="60"
+            fill="freeze" />
+        </circle>
+      </g>
+
+      <g fill="none" stroke-width="20"
+        stroke="#888" stroke-linecap="round" stroke-linejoin="round">
+        <path d="M100,100c0,200 200,200 200,0">
+          <set attributeName="display" to="none" begin="4s" />
+        </path>
+        <path d="M400,200c0,200 200,200 200,0" />
+      </g>
+    </g>
+  </g>
+  <script>
+    if (window.testRunner)
+        testRunner.waitUntilDone();
+
+    function loaded() {
+        document.documentElement.setCurrentTime(8);
+
+        if (window.testRunner)
+            testRunner.notifyDone();
+    }
+  </script>
+</svg>