Update web-platform-tests to revision 9817f7f027fe1e92cc2fce31d6002c4d669918e8

tests/wpt/web-platform-tests/common/arrays.js

@@ -0,0 +1,16 @@
+// Returns true if the given arrays are equal. Optionally can pass an equality function.
+export function areArraysEqual(a, b, equalityFunction = (c, d) => { return c === d; }) {
+  try {
+    if (a.length !== b.length)
+      return false;
+
+    for (let i = 0; i < a.length; i++) {
+      if (!equalityFunction(a[i], b[i]))
+        return false;
+    }
+  } catch (ex) {
+    return false;
+  }
+
+  return true;
+}