Get rid of {Run,Terminate}MainApplication(), and more ApplicationDelegate conversion.

examples/echo/echo_client_sync.cc

 // 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.
 
 // This example demonstrates the simple use of SynchronousInterfacePtr<>, which
 // is the blocking, synchronous version of mojom interface calls (typically used
 // via InterfacePtr<>).
 
 #include "examples/echo/echo.mojom-sync.h"
 #include "mojo/public/c/system/main.h"
@@ skipping 18 matching lines @@
     MOJO_LOG(INFO) << "Got response: " << out;
     RunLoop::current()->Quit();
   }
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle application_request) {
   mojo::examples::EchoClientApp echo_client_app;
-  return mojo::RunMainApplication(application_request, &echo_client_app);
+  return mojo::RunApplication(application_request, &echo_client_app);
 }