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

chrome/installer/util/install_util.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.
 //
 // See the corresponding header file for description of the functions in this
 // file.
 
 #include "chrome/installer/util/install_util.h"
 
 #include <shellapi.h>
@@ skipping 138 matching lines @@
   }
 
   CommandLine cmd(CommandLine::FromString(cmd_str));
   // Force creation of shortcuts as the First Run beacon might land between now
   // and the time setup.exe checks for it.
   cmd.AppendSwitch(installer::switches::kForceConfigureUserSettings);
 
   base::LaunchOptions launch_options;
   if (base::win::IsMetroProcess())
     launch_options.force_breakaway_from_job_ = true;
-  base::Process process =
-      base::LaunchProcess(cmd.GetCommandLineString(), launch_options);
-  if (!process.IsValid())
+  if (!base::LaunchProcess(cmd.GetCommandLineString(), launch_options, NULL))
     PLOG(ERROR) << cmd.GetCommandLineString();
 }
 
 bool InstallUtil::ExecuteExeAsAdmin(const CommandLine& cmd, DWORD* exit_code) {
   base::FilePath::StringType program(cmd.GetProgram().value());
   DCHECK(!program.empty());
   DCHECK_NE(program[0], L'\"');
 
   CommandLine::StringType params(cmd.GetCommandLineString());
   if (params[0] == '"') {
@@ skipping 476 matching lines @@
   // Open the program and see if it references the expected file.
   base::File file;
   BY_HANDLE_FILE_INFORMATION info = {};
 
   return (OpenForInfo(path, &file) &&
           GetInfo(file, &info) &&
           info.dwVolumeSerialNumber == file_info_.dwVolumeSerialNumber &&
           info.nFileIndexHigh == file_info_.nFileIndexHigh &&
           info.nFileIndexLow == file_info_.nFileIndexLow);
 }