Making it possible to import mediastream tests.

Tools/Scripts/webkitpy/w3c/test_importer.py

 # Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1. Redistributions of source code must retain the above
 #    copyright notice, this list of conditions and the following
 #    disclaimer.
 # 2. Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 
     - By default, only reftests and jstest are imported. This can be overridden
       with a -a or --all argument
 
     - Also by default, if test files by the same name already exist in the
       destination directory, they are overwritten with the idea that running
       this script would refresh files periodically.  This can also be
       overridden by a -n or --no-overwrite flag
 
     - All files are converted to work in WebKit:
-         1. Paths to testharness.js files are modified point to Webkit's copy
-            of them in LayoutTests/resources, using the correct relative path
-            from the new location.
+         1. Paths to testharness.js and vendor-prefix.js files are modified to
+            point to Webkit's copy of them in LayoutTests/resources, using the
+            correct relative path from the new location.
          2. All CSS properties requiring the -webkit-vendor prefix are prefixed
             (the list of what needs prefixes is read from Source/WebCore/CSS/CSSProperties.in).
          3. Each reftest has its own copy of its reference file following
             the naming conventions new-run-webkit-tests expects.
          4. If a reference files lives outside the directory of the test that
             uses it, it is checked for paths to support files as it will be
             imported into a different relative position to the test file
             (in the same directory).
+         5. Any tags with the class "instructions" have style="display:none" added
+            to them. Some w3c tests contain instructions to manual testers which we
+            want to strip out (the test result parser only recognizes pure testharness.js
+            output and not those instructions).
 
      - Upon completion, script outputs the total number tests imported, broken
        down by test type
 
      - Also upon completion, if we are not importing the files in place, each
        directory where files are imported will have a w3c-import.log file written with
        a timestamp, the W3C Mercurial changeset if available, the list of CSS
        properties used that require prefixes, the list of imported files, and
        guidance for future test modification and maintenance. On subsequent
        imports, this file is read to determine if files have been
@@ skipping 409 matching lines @@
             for prop in prop_list:
                 import_log.write(prop + '\n')
         else:
             import_log.write('None\n')
         import_log.write('------------------------------------------------------------------------\n')
         import_log.write('List of files:\n')
         for item in file_list:
             import_log.write(item + '\n')
 
         import_log.close()