Fix ChromeDriver flakiness with the C# webdriver bindings.

chrome/test/webdriver/webdriver_switches.cc

Index: chrome/test/webdriver/webdriver_switches.cc
diff --git a/chrome/test/webdriver/webdriver_switches.cc b/chrome/test/webdriver/webdriver_switches.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3e4427719ff45aee20bf82d6a051a2fb96cf112e
--- /dev/null
+++ b/chrome/test/webdriver/webdriver_switches.cc
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 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.
+
+#include "chrome/test/webdriver/webdriver_switches.h"
+
+namespace webdriver {
+
+// Instructs the mongoose webserver to enable HTTP persistent
+// connections.
+const char kEnableKeepAlive[] = "enable-keep-alive";
+
+}  // namespace webdriver