Extend PathService::Get to be able to return the X86 program files path.

base/base_paths_win.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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_BASE_PATHS_WIN_H__
 #define BASE_BASE_PATHS_WIN_H__
 #pragma once
 
 // This file declares windows-specific path keys for the base module.
 // These can be used with the PathService to access various special
 // directories and files.
 
 namespace base {
 
 enum {
   PATH_WIN_START = 100,
 
   DIR_WINDOWS,  // Windows directory, usually "c:\windows"
   DIR_SYSTEM,   // Usually c:\windows\system32"
-  DIR_PROGRAM_FILES, // Usually c:\program files
+  DIR_PROGRAM_FILES,      // Usually c:\program files
+  DIR_PROGRAM_FILESX86,   // Usually c:\program files or c:\program files (x86)
 
   DIR_IE_INTERNET_CACHE,  // Temporary Internet Files directory.
   DIR_COMMON_START_MENU,  // Usually "C:\Documents and Settings\All Users\
                           // Start Menu\Programs"
   DIR_START_MENU,         // Usually "C:\Documents and Settings\<user>\
                           // Start Menu\Programs"
   DIR_APP_DATA,           // Application Data directory under the user profile.
   DIR_PROFILE,            // Usually "C:\Documents and settings\<user>.
   DIR_LOCAL_APP_DATA_LOW,  // Local AppData directory for low integrity level.
   DIR_LOCAL_APP_DATA,  // "Local Settings\Application Data" directory under the
                        // user profile.
   PATH_WIN_END
 };
 
 }  // namespace base
 
 #endif  // BASE_BASE_PATHS_WIN_H__