Enable connection to Mojo services from Blink

third_party/WebKit/Source/platform/exported/Platform.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 131 matching lines @@
 }
 
 WebThread* Platform::mainThread() const {
   return m_mainThread;
 }
 
 InterfaceProvider* Platform::interfaceProvider() {
   return InterfaceProvider::getEmptyInterfaceProvider();
 }
 
+service_manager::mojom::blink::ConnectorPtr Platform::serviceConnector() {
+  return service_manager::mojom::blink::ConnectorPtr();
+}
+
 }  // namespace blink