Split ProcessHandle and its related routines into base/process/process_handle.h.

base/process.h

 // Copyright (c) 2011 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 BASE_PROCESS_H_
 #define BASE_PROCESS_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
+#include "base/process/process_handle.h"
 #include "build/build_config.h"
 
-#include <sys/types.h>
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 namespace base {
 
-// ProcessHandle is a platform specific type which represents the underlying OS
-// handle to a process.
-// ProcessId is a number which identifies the process in the OS.
-#if defined(OS_WIN)
-typedef HANDLE ProcessHandle;
-typedef DWORD ProcessId;
-typedef HANDLE UserTokenHandle;
-const ProcessHandle kNullProcessHandle = NULL;
-const ProcessId kNullProcessId = 0;
-#elif defined(OS_POSIX)
-// On POSIX, our ProcessHandle will just be the PID.
-typedef pid_t ProcessHandle;
-typedef pid_t ProcessId;
-const ProcessHandle kNullProcessHandle = 0;
-const ProcessId kNullProcessId = 0;
-#endif  // defined(OS_WIN)
-
 class BASE_EXPORT Process {
  public:
   Process() : process_(kNullProcessHandle) {
   }
 
   explicit Process(ProcessHandle handle) : process_(handle) {
   }
 
   // A handle to the current process.
   static Process Current();
@@ skipping 36 matching lines @@
   // of this value is OS dependent.
   int GetPriority() const;
 
  private:
   ProcessHandle process_;
 };
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_H_