Convert filesystem_apptests to shelltests.

mojo/shell/public/cpp/shell_test.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_SHELL_PUBLIC_CPP_SHELL_TEST_H_
 #define MOJO_SHELL_PUBLIC_CPP_SHELL_TEST_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "mojo/shell/public/cpp/connector.h"
@@ skipping 82 matching lines @@
   scoped_ptr<ShellConnection> shell_connection_;
 
   // See constructor.
   std::string test_name_;
 
   Connector* connector_ = nullptr;
   std::string initialize_name_;
   std::string initialize_userid_ = shell::mojom::kInheritUserID;
   uint32_t initialize_instance_id_ = shell::mojom::kInvalidInstanceID;
 
+  base::Closure initialize_called_;
+
   DISALLOW_COPY_AND_ASSIGN(ShellTest);
 };
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_PUBLIC_CPP_SHELL_TEST_H_