Move the dom directory from web-platform-tests/ to wpt/.

third_party/WebKit/LayoutTests/imported/web-platform-tests/dom/nodes/mutationobservers.js

-// Compares a mutation record to a predefined one
-// mutationToCheck is a mutation record from the user agent
-// expectedRecord is a mutation record minted by the test
-//    for expectedRecord, if properties are ommitted, they get default ones
-function checkRecords(target, mutationToCheck, expectedRecord) {
-  var mr1;
-  var mr2;
-
-
-  function checkField(property, isArray) {
-    var field = mr2[property];
-    if (isArray === undefined) {
-      isArray = false;
-    }
-    if (field instanceof Function) {
-      field = field();
-    } else if (field === undefined) {
-      if (isArray) {
-        field = new Array();
-      } else {
-        field = null;
-      }
-    }
-    if (isArray) {
-      assert_array_equals(mr1[property], field, property + " didn't match");
-    } else {
-      assert_equals(mr1[property], field, property + " didn't match");
-    }
-  }
-
-  assert_equals(mutationToCheck.length, expectedRecord.length, "mutation records must match");
-  for (var item = 0; item < mutationToCheck.length; item++) {
-    mr1 = mutationToCheck[item];
-    mr2 = expectedRecord[item];
-
-    if (mr2.target instanceof Function) {
-      assert_equals(mr1.target, mr2.target(), "target node must match");
-    } else if (mr2.target !== undefined) {
-      assert_equals(mr1.target, mr2.target, "target node must match");
-    } else {
-      assert_equals(mr1.target, target, "target node must match");
-    }
-
-    checkField("type");
-    checkField("addedNodes", true);
-    checkField("removedNodes", true);
-    checkField("previousSibling");
-    checkField("nextSibling");
-    checkField("attributeName");
-    checkField("attributeNamespace");
-    checkField("oldValue");
-  };
-}
-
-function runMutationTest(node, mutationObserverOptions, mutationRecordSequence, mutationFunction, description, target) {
-  var test = async_test(description);
-
-
-  function moc(mrl, obs) {
-    test.step(
-      function () {
-            if (target === undefined) target = node;
-            checkRecords(target, mrl, mutationRecordSequence);
-        test.done();
-      }
-     );
-  }
-
-  test.step(
-    function () {
-      (new MutationObserver(moc)).observe(node, mutationObserverOptions);
-      mutationFunction();
-    }
-  );
-  return mutationRecordSequence.length
-}