Remove ApplicationRunner::{Get,Set}DefaultLogger().

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 {
 //   public:
 //    void Initialize(mojo::ApplicationImpl* app) override {
 //      LogPtr log;
 //      app->ConnectToService("mojo:log", &log);
 //      mojo::log::InitializeLogger(std::move(log),
-//                                  ApplicationRunner::GetDefaultLogger());
-//      mojo::ApplicationRunner::SetDefaultLogger(mojo::log::GetLogger());
+//                                  mojo::Environment::GetDefaultLogger());
+//      mojo::Environment::SetDefaultLogger(mojo::log::GetLogger());
 //    }
 //
 //    void Quit() {
 //      mojo::log::DestroyLogger();
 //    }
 //  };
 //
 //  MojoResult MojoMain(MojoHandle app_request) {
 //    mojo::ApplicationRunner runner(new MyDelegate);
 //    return runner.Run(app_request);
@@ skipping 18 matching lines @@
 // 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_