Add a mojo::RunApplication() for running implementations of ApplicationImplBase.

mojo/services/log/cpp/log_client.h

 // Copyright 2015 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 is a client library that constructs a MojoLogger that can talk to a
 // Mojo logging service (see ../interfaces/log.mojo). It provides a |MojoLogger|
 // implementation which can be used as the default environment logger.
 //
 // Example application that uses this log client to talk to the log service:
 //
-//  class MyDelegate : public mojo::ApplicationDelegate {
+//  class MyApp : public mojo::ApplicationImplBase {
 //   public:
-//    void Initialize(mojo::ApplicationImpl* app) override {
+//    void OnInitialize() override {
 //      LogPtr log;
-//      app->ConnectToService("mojo:log", &log);
+//      mojo::ConnectToService(shell(), "mojo:log", &log);
 //      mojo::log::InitializeLogger(std::move(log),
 //                                  mojo::Environment::GetDefaultLogger());
 //      mojo::Environment::SetDefaultLogger(mojo::log::GetLogger());
 //    }
 //
-//    void Quit() {
+//    void OnQuit() override {
 //      mojo::log::DestroyLogger();
 //    }
 //  };
 //
 //  MojoResult MojoMain(MojoHandle app_request) {
-//    mojo::ApplicationRunner runner(new MyDelegate);
-//    return runner.Run(app_request);
+//    MyApp app;
+//    mojo::RunApplication(&app);
+//    return MOJO_RESULT_OK;
 //  }
 
 #ifndef MOJO_SERVICES_LOG_CPP_LOG_CLIENT_H_
 #define MOJO_SERVICES_LOG_CPP_LOG_CLIENT_H_
 
 #include "mojo/public/c/environment/logger.h"
 #include "mojo/services/log/interfaces/log.mojom.h"
 
 namespace mojo {
 namespace log {
 
 // Constructs a MojoLogger (which can be retrieved with |GetLogger()|) that
 // talks to the provided log service. |fallback_logger| must be non-null and
 // will be used if the provided |log_service| fails. The constructed MojoLogger
 // may also call into |fallback_logger|'s [Set|Get]MinimumLogLevel functions to
 // keep the minimum levels consistent.
 void InitializeLogger(LogPtr log_service, const MojoLogger* fallback_logger);
 
 // Must be called after |InitializeLogger()| and before |DestroyLogger()|. The
 // returned MojoLogger is thread-safe.
 const MojoLogger* GetLogger();
 
 void DestroyLogger();
 
 }  // namespace log
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_LOG_CPP_LOG_CLIENT_H_