Put a copy of the wptrunner harness in-tree.

This is the same configuration as gecko and is convenient for making changes compared
to using releases from pypi

tests/wpt/harness/wptrunner/browsers/servo.py

@@ -0,0 +1,55 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# 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 os
+
+from .base import NullBrowser, ExecutorBrowser, require_arg
+from ..executors import executor_kwargs as base_executor_kwargs
+from ..executors.executorservo import ServoTestharnessExecutor, ServoRefTestExecutor
+
+here = os.path.join(os.path.split(__file__)[0])
+
+__wptrunner__ = {"product": "servo",
+                 "check_args": "check_args",
+                 "browser": "ServoBrowser",
+                 "executor": {"testharness": "ServoTestharnessExecutor",
+                              "reftest": "ServoRefTestExecutor"},
+                 "browser_kwargs": "browser_kwargs",
+                 "executor_kwargs": "executor_kwargs",
+                 "env_options": "env_options"}
+
+
+def check_args(**kwargs):
+    require_arg(kwargs, "binary")
+
+
+def browser_kwargs(**kwargs):
+    return {"binary": kwargs["binary"],
+            "debug_args": kwargs["debug_args"],
+            "interactive": kwargs["interactive"]}
+
+
+def executor_kwargs(test_type, server_config, cache_manager, **kwargs):
+    rv = base_executor_kwargs(test_type, server_config,
+                              cache_manager, **kwargs)
+    rv["pause_after_test"] = kwargs["pause_after_test"]
+    return rv
+
+def env_options():
+    return {"host": "localhost",
+            "bind_hostname": "true",
+            "testharnessreport": "testharnessreport-servo.js"}
+
+
+class ServoBrowser(NullBrowser):
+    def __init__(self, logger, binary, debug_args=None, interactive=False):
+        NullBrowser.__init__(self, logger)
+        self.binary = binary
+        self.debug_args = debug_args
+        self.interactive = interactive
+
+    def executor_browser(self):
+        return ExecutorBrowser, {"binary": self.binary,
+                                 "debug_args": self.debug_args,
+                                 "interactive": self.interactive}