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

services/tracing/main.cc

Index: services/tracing/main.cc
diff --git a/services/tracing/main.cc b/services/tracing/main.cc
index 2c9ca06c3a900fb838ebb0da31f25364f0b0850a..96ee48caa4244a4eaa4ee8b49ca3997ad88d9bc4 100644
--- a/services/tracing/main.cc
+++ b/services/tracing/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/tracing/tracing_app.h"
 
 MojoResult MojoMain(MojoHandle application_request) {
+  mojo::ScopedChromiumInit init;
   tracing::TracingApp tracing_app;
-  return mojo::RunMainApplication(application_request, &tracing_app);
+  return mojo::RunApplication(application_request, &tracing_app);
 }