Adds remote devtools support to cast_shell.

chromecast/common/pref_names.cc

Index: chromecast/common/pref_names.cc
diff --git a/chromecast/common/pref_names.cc b/chromecast/common/pref_names.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0fed7c8e8b606d1ddbdf7fa660a91be8b364cb13
--- /dev/null
+++ b/chromecast/common/pref_names.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "chromecast/common/pref_names.h"
+
+namespace prefs {
+
+// Port on which to host the remote debugging server. A value of 0 indicates
+// that remote debugging is disabled.
+const char kRemoteDebuggingPort[] = "remote_debugging_port";
+
+}  // namespace prefs