[Chromoting] Reimplemented the worker process launcher to take into account the encountered issues:

remoting/host/win/unprivileged_process_delegate.h

+// Copyright (c) 2012 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 REMOTING_HOST_WIN_UNPRIVILEGED_PROCESS_DELEGATE_H_
+#define REMOTING_HOST_WIN_UNPRIVILEGED_PROCESS_DELEGATE_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "remoting/host/win/worker_process_launcher.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+} // namespace base
+
+namespace remoting {
+
+// Implements logic for launching and monitoring a worker process under a less
+// privileged user account.
+class UnprivilegedProcessDelegate : public WorkerProcessLauncher::Delegate {
+ public:
+  UnprivilegedProcessDelegate(
+      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
+      const FilePath& binary_path);
+  virtual ~UnprivilegedProcessDelegate();
+
+  // WorkerProcessLauncher::Delegate implementation.
+  virtual DWORD GetExitCode() OVERRIDE;
+  virtual void KillProcess(DWORD exit_code) OVERRIDE;
+  virtual bool LaunchProcess(
+      const std::string& channel_name,
+      base::win::ScopedHandle* process_exit_event_out) OVERRIDE;
+
+ private:
+  // The task runner all public methods of this class should be called on.
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
+
+  // The task runner serving job object notifications.
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
+
+  // Path to the worker process binary.
+  FilePath binary_path_;
+
+  // The handle of the worker process, if launched.
+  base::win::ScopedHandle worker_process_;
+
+  DISALLOW_COPY_AND_ASSIGN(UnprivilegedProcessDelegate);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_WIN_UNPRIVILEGED_PROCESS_DELEGATE_H_