mojo: kill app_thread before unloading main app library and add tests

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
@@ skipping 10 matching lines @@
 
  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_;
   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_