Get rid of KeepAlive. Quit shell when all urls run directly by Context are closed.

mojo/shell/in_process_dynamic_service_runner.h

 // Copyright 2014 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_SHELL_IN_PROCESS_DYNAMIC_SERVICE_RUNNER_H_
 #define MOJO_SHELL_IN_PROCESS_DYNAMIC_SERVICE_RUNNER_H_
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/scoped_native_library.h"
 #include "base/threading/simple_thread.h"
 #include "mojo/shell/dynamic_service_runner.h"
-#include "mojo/shell/keep_alive.h"
 
 namespace mojo {
 namespace shell {
 
 // An implementation of |DynamicServiceRunner| that loads/runs the given app
 // (from the file system) on a separate thread (in the current process).
 class InProcessDynamicServiceRunner
     : public DynamicServiceRunner,
       public base::DelegateSimpleThread::Delegate {
  public:
   explicit InProcessDynamicServiceRunner(Context* context);
   virtual ~InProcessDynamicServiceRunner();
 
   // |DynamicServiceRunner| method:
   virtual void Start(const base::FilePath& app_path,
                      ScopedMessagePipeHandle service_handle,
                      const base::Closure& app_completed_callback) OVERRIDE;
 
  private:
   // |base::DelegateSimpleThread::Delegate| method:
   virtual void Run() OVERRIDE;
 
-  KeepAlive keep_alive_;
   base::FilePath app_path_;
   ScopedMessagePipeHandle service_handle_;
   base::Callback<bool(void)> app_completed_callback_runner_;
 
   base::ScopedNativeLibrary app_library_;
   scoped_ptr<base::DelegateSimpleThread> thread_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessDynamicServiceRunner);
 };
 
 typedef DynamicServiceRunnerFactoryImpl<InProcessDynamicServiceRunner>
     InProcessDynamicServiceRunnerFactory;
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_IN_PROCESS_DYNAMIC_SERVICE_RUNNER_H_