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

services/files/main.cc

Index: services/files/main.cc
diff --git a/services/files/main.cc b/services/files/main.cc
index 500cd9e4a068b96a43c102f17a669abe515da409..9edd5b21319dd6eee8a67ba3f0f1e7461e4d3121 100644
--- a/services/files/main.cc
+++ b/services/files/main.cc
@@ -2,11 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "mojo/environment/scoped_chromium_init.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/run_application.h"
 #include "services/files/files_app.h"
 
 MojoResult MojoMain(MojoHandle application_request) {
+  mojo::ScopedChromiumInit init;
   mojo::files::FilesApp files_app;
-  return mojo::RunMainApplication(application_request, &files_app);
+  return mojo::RunApplication(application_request, &files_app);
 }