Regenerate MANIFEST.json when WPT tests are run

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py
index 80fe591f846d834dc0ae41483ce1cf52befe7a28..0e6bf50a170bdd1f7e06b958e57d4b86216770c0 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/base.py
@@ -744,6 +744,26 @@ class Port(object):
         manifest_path = self._filesystem.join(self.layout_tests_dir(), 'external', 'wpt', 'MANIFEST.json')
         return WPTManifest(self._filesystem.read_text_file(manifest_path))
 
+    def _manifest_items_for_path(self, path_in_wpt):

[foolip, 2017/02/16 07:20:26]

Looks like this is unused now?

+        """Returns a manifest item for the given WPT path, or None if not found.
+
+        The format of a manifest item depends on
+        https://github.com/w3c/wpt-tools/blob/master/manifest/item.py
+        and is assumed to be a list of the format [url, extras],
+        or [url, references, extras] for reftests, or None if not found.
+
+        For most testharness tests, the returned manifest_items is expected
+        to look like this:: [["/some/test/path.html", {}]]
+        """
+        items = self._wpt_manifest()['items']
+        if path_in_wpt in items['manual']:
+            return items['manual'][path_in_wpt]
+        elif path_in_wpt in items['reftest']:
+            return items['reftest'][path_in_wpt]
+        elif path_in_wpt in items['testharness']:
+            return items['testharness'][path_in_wpt]
+        return None
+
     def is_slow_wpt_test(self, test_file):
         match = re.match(r'external/wpt/(.*)', test_file)
         if not match: