Make the test-wpt mach command support all the command line arguments of wptrunner.

Also remove the shell script and ensure that default options are set in a single location

tests/wpt/run.py

@@ -2,34 +2,54 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-import sys, os, argparse
+import argparse
+import multiprocessing
+import os
+import sys
 
 here = os.path.split(__file__)[0]
 servo_root = os.path.abspath(os.path.join(here, "..", ".."))
 
-def wptsubdir(*args):
+def wpt_path(*args):
     return os.path.join(here, *args)
 
+def servo_path(*args):
+    return os.path.join(servo_root, *args)
+
 # Imports
-sys.path.append(wptsubdir("web-platform-tests"))
+sys.path.append(wpt_path("harness"))
 from wptrunner import wptrunner, wptcommandline
 
-def run_tests(**kwargs):
-    wptrunner.setup_logging(kwargs, {"raw": sys.stdout})
+def run_tests(paths=None, **kwargs):
+    if paths is None:
+        paths = {}
+    set_defaults(paths, kwargs)
+    wptrunner.setup_logging(kwargs, {"mach": sys.stdout})
     return wptrunner.run_tests(**kwargs)
 
-def set_defaults(args):
-    args.include_manifest = args.include_manifest if args.include_manifest else wptsubdir("include.ini")
-    args.product = "servo"
-    rv = vars(args)
-    wptcommandline.check_args(rv)
-    return rv
+def set_defaults(paths, kwargs):
+    if kwargs["product"] is None:
+        kwargs["product"] = "servo"
 
-def main():
+    if kwargs["config"] is None and "config" in paths:
+        kwargs["config"] = paths["config"]
+
+    if kwargs["include_manifest"] is None and "include_manifest" in paths:
+        kwargs["include_manifest"] = paths["include_manifest"]
+
+    if kwargs["binary"] is None:
+        bin_dir = "release" if kwargs["release"] else "debug"
+        bin_path = servo_path("components", "servo", "target", bin_dir, "servo")
+
+        kwargs["binary"] = bin_path
+
+    if kwargs["processes"] is None:
+        kwargs["processes"] = multiprocessing.cpu_count()
+
+    wptcommandline.check_args(kwargs)
+
+def main(paths=None):
     parser = wptcommandline.create_parser()
-    args = parser.parse_args()
-    kwargs = set_defaults(args)
-    return run_tests(**kwargs)
+    kwargs = vars(parser.parse_args())
+    return run_tests(paths, **kwargs)
 
-if __name__ == "__main__":
-    sys.exit(0 if main() else 1)