Test that a WebSocket handshake response with an empty valued header is accepted

LayoutTests/http/tests/websocket/handshake-response-with-empty-valued-header_wsh.py

 # Copyright 2014 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.
 
-{
-  'variables': {
-    'blink_core_output_dir': '<(SHARED_INTERMEDIATE_DIR)/blink/core',
-  },
-}
+
+def web_socket_do_extra_handshake(request):
+    request.extra_headers.append(('foo', ''))
+
+
+def web_socket_transfer_data(request):
+    pass