Update links to testharness.js to point to new location.
After moving testharness.js to be part of web-platform-tests its
documentation is no longer available at the old location.
BUG=None
Review-Url: https://codereview.chromium.org/2858043002
Cr-Commit-Position: refs/heads/master@{#469086}
diff --git a/docs/testing/writing_layout_tests.md b/docs/testing/writing_layout_tests.md
index 81146831..7ca4d0f 100644
--- a/docs/testing/writing_layout_tests.md
+++ b/docs/testing/writing_layout_tests.md
@@ -93,13 +93,13 @@
less reliable tests.
All new JavaScript tests should be written using the
-[testharness.js](https://github.com/w3c/testharness.js/) testing framework. This
-framework is used by the tests in the
+[testharness.js](https://github.com/w3c/web-platform-tests/tree/master/resources)
+testing framework. This framework is used by the tests in the
[web-platform-tests](https://github.com/w3c/web-platform-tests) repository,
which is shared with all the other browser vendors, so `testharness.js` tests
are more accessible to browser developers.
-See the [API documentation](https://github.com/w3c/testharness.js/blob/master/docs/api.md)
+See the [API documentation](http://web-platform-tests.org/writing-tests/testharness-api.html)
for a thorough introduction to `testharness.js`.
Layout tests should follow the recommendations of the above documentation.