Add script for running wptserve from the command line.

Currently it is rather annoying to spin up a wptserve instance to test
the imported Web Platform Tests, even though there is a convenient
--enable-wptserve option to run-webkit-tests. This adds a simple script,
run-blink-wptserve, to start a wptserve instance and allow for easier
manual testing.

Review URL: https://codereview.chromium.org/1408763002

Cr-Commit-Position: refs/heads/master@{#354360}

third_party/WebKit/Tools/Scripts/run-blink-wptserve

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Runs an instance of wptserve to allow manual testing of the imported Web
+# Platform Tests. The main HTTP server is run on 8001, while the main HTTPS
+# server is run on 8444.
+
+import webkitpy.common.version_check
+
+from webkitpy.layout_tests.servers import cli_wrapper
+from webkitpy.layout_tests.servers import wptserve
+
+cli_wrapper.main(wptserve.WPTServe)