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

mojo/application/run_application_options_chromium.h

 // Copyright 2016 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.
 
 #ifndef MOJO_APPLICATION_RUN_APPLICATION_OPTIONS_CHROMIUM_H_
 #define MOJO_APPLICATION_RUN_APPLICATION_OPTIONS_CHROMIUM_H_
 
 #include "base/message_loop/message_loop.h"
 #include "mojo/public/cpp/application/run_application.h"
 
 namespace mojo {
 
-// Options for the "chromium" implementation of |RunMainApplication()| and
-// |RunApplication()|.
+// Options for the "chromium" implementation of |RunApplication()|.
 class RunApplicationOptionsChromium : public RunApplicationOptions {
  public:
   explicit RunApplicationOptionsChromium(
       base::MessageLoop::Type message_loop_type)
       : message_loop_type(message_loop_type) {}
   ~RunApplicationOptionsChromium() {}
 
   base::MessageLoop::Type message_loop_type;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_APPLICATION_RUN_APPLICATION_OPTIONS_CHROMIUM_H_