[GCM] Add connection factory for creating MCS connections

google_apis/gcm/engine/connection_factory.cc

Index: google_apis/gcm/engine/connection_factory.cc
diff --git a/google_apis/gcm/engine/connection_factory.cc b/google_apis/gcm/engine/connection_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..016e1e2b89c7b7f571194620f25ff0f4516c9887
--- /dev/null
+++ b/google_apis/gcm/engine/connection_factory.cc
@@ -0,0 +1,12 @@
+// Copyright 2013 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 "google_apis/gcm/engine/connection_factory.h"
+
+namespace gcm {
+
+ConnectionFactory::ConnectionFactory() {}
+ConnectionFactory::~ConnectionFactory() {}
+
+}  // namespace gcm