Implement a trivial Mojo EchoService that can be connected to over DBus

mojo/shell/context.cc

 // 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 "mojo/shell/context.h"
 
 #include "base/command_line.h"
 #include "mojo/embedder/embedder.h"
 #include "mojo/gles2/gles2_support_impl.h"
 #include "mojo/service_manager/service_loader.h"
 #include "mojo/service_manager/service_manager.h"
 #include "mojo/services/native_viewport/native_viewport_service.h"
+#include "mojo/shell/dbus_service_loader.h"
 #include "mojo/shell/dynamic_service_loader.h"
 #include "mojo/shell/in_process_dynamic_service_runner.h"
 #include "mojo/shell/network_delegate.h"
 #include "mojo/shell/out_of_process_dynamic_service_runner.h"
 #include "mojo/shell/switches.h"
 #include "mojo/spy/spy.h"
 
 namespace mojo {
 namespace shell {
 
@@ skipping 36 matching lines @@
   else
     runner_factory.reset(new InProcessDynamicServiceRunnerFactory());
 
   dynamic_service_loader_.reset(
       new DynamicServiceLoader(this, runner_factory.Pass()));
   service_manager_.set_default_loader(dynamic_service_loader_.get());
   native_viewport_service_loader_.reset(new NativeViewportServiceLoader(this));
   service_manager_.SetLoaderForURL(native_viewport_service_loader_.get(),
                                     GURL("mojo:mojo_native_viewport_service"));
 
+  dbus_service_loader_.reset(new DBusServiceLoader(this));
+  service_manager_.SetLoaderForScheme(dbus_service_loader_.get(), "dbus");
+
   if (cmdline->HasSwitch(switches::kSpy)) {
     spy_.reset(new mojo::Spy(&service_manager_,
                              cmdline->GetSwitchValueASCII(switches::kSpy)));
   }
 }
 
 Context::~Context() {
   service_manager_.set_default_loader(NULL);
 }
 
 }  // namespace shell
 }  // namespace mojo