Update testharness.js and friends (and duplicate copies)

third_party/WebKit/LayoutTests/resources/testharness.js

Index: third_party/WebKit/LayoutTests/resources/testharness.js
diff --git a/third_party/WebKit/LayoutTests/resources/testharness.js b/third_party/WebKit/LayoutTests/resources/testharness.js
index 9ad4f9aa5c1acdfd6be2c6903f53d7013e92fee2..7920ccd4e80e434a24b13978e9aa5db7031881a2 100644
--- a/third_party/WebKit/LayoutTests/resources/testharness.js
+++ b/third_party/WebKit/LayoutTests/resources/testharness.js
@@ -658,6 +658,14 @@ policies and contribution forms [3].
         object.addEventListener(event, callback, false);
     }
 
+    function step_timeout(f, t) {
+        var outer_this = this;
+        var args = Array.prototype.slice.call(arguments, 2);
+        return setTimeout(function() {
+            f.apply(outer_this, args);
+        }, t * tests.timeout_multiplier);
+    }
+
     expose(test, 'test');
     expose(async_test, 'async_test');
     expose(promise_test, 'promise_test');
@@ -666,6 +674,7 @@ policies and contribution forms [3].
     expose(setup, 'setup');
     expose(done, 'done');
     expose(on_event, 'on_event');
+    expose(step_timeout, 'step_timeout');
 
     /*
      * Return a string truncated to the given length, with ... added at the end
@@ -1097,7 +1106,7 @@ policies and contribution forms [3].
     function _assert_inherits(name) {
         return function (object, property_name, description)
         {
-            assert(typeof object === "object",
+            assert(typeof object === "object" || typeof object === "function",
                    name, description,
                    "provided value is not an object");
 
@@ -1167,6 +1176,7 @@ policies and contribution forms [3].
                 NO_MODIFICATION_ALLOWED_ERR: 'NoModificationAllowedError',
                 NOT_FOUND_ERR: 'NotFoundError',
                 NOT_SUPPORTED_ERR: 'NotSupportedError',
+                INUSE_ATTRIBUTE_ERR: 'InUseAttributeError',
                 INVALID_STATE_ERR: 'InvalidStateError',
                 SYNTAX_ERR: 'SyntaxError',
                 INVALID_MODIFICATION_ERR: 'InvalidModificationError',
@@ -1193,6 +1203,7 @@ policies and contribution forms [3].
                 NoModificationAllowedError: 7,
                 NotFoundError: 8,
                 NotSupportedError: 9,
+                InUseAttributeError: 10,
                 InvalidStateError: 11,
                 SyntaxError: 12,
                 InvalidModificationError: 13,
@@ -1422,6 +1433,14 @@ policies and contribution forms [3].
         });
     };
 
+    Test.prototype.step_timeout = function(f, timeout) {
+        var test_this = this;
+        var args = Array.prototype.slice.call(arguments, 2);
+        return setTimeout(this.step_func(function() {
+            return f.apply(test_this, args);
+        }, timeout * tests.timeout_multiplier));
+    }
+
     Test.prototype.add_cleanup = function(callback) {
         this.cleanup_callbacks.push(callback);
     };