Revert of Upgrade the windows specific version of LaunchProcess to avoid raw handles.

chrome/browser/extensions/api/messaging/native_process_launcher_posix.cc

 // 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.
 
 #include "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
@@ skipping 32 matching lines @@
 
   if (result.empty())
     *error_message = "Can't find native messaging host " + host_name;
 
   return result;
 }
 
 // static
 bool NativeProcessLauncher::LaunchNativeProcess(
     const CommandLine& command_line,
-    base::Process* process,
+    base::ProcessHandle* process_handle,
     base::File* read_file,
     base::File* write_file) {
   base::FileHandleMappingVector fd_map;
 
   int read_pipe_fds[2] = {0};
   if (HANDLE_EINTR(pipe(read_pipe_fds)) != 0) {
     LOG(ERROR) << "Bad read pipe";
     return false;
   }
   base::ScopedFD read_pipe_read_fd(read_pipe_fds[0]);
@@ skipping 10 matching lines @@
   fd_map.push_back(std::make_pair(write_pipe_read_fd.get(), STDIN_FILENO));
 
   base::LaunchOptions options;
   options.fds_to_remap = &fd_map;
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   // Don't use no_new_privs mode, e.g. in case the host needs to use sudo.
   options.allow_new_privs = true;
 #endif
 
-  base::ProcessHandle process_handle;
-  if (!base::LaunchProcess(command_line, options, &process_handle)) {
+  if (!base::LaunchProcess(command_line, options, process_handle)) {
     LOG(ERROR) << "Error launching process";
     return false;
   }
 
   // We will not be reading from the write pipe, nor writing from the read pipe.
   write_pipe_read_fd.reset();
   read_pipe_write_fd.reset();
 
-  *process = base::Process(process_handle);
   *read_file = base::File(read_pipe_read_fd.release());
   *write_file = base::File(write_pipe_write_fd.release());
 
   return true;
 }
 
 }  // namespace extensions