Change PPDCache to use a path inside the per-user profile.

chrome/common/chrome_paths.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 CHROME_COMMON_CHROME_PATHS_H__
 #define CHROME_COMMON_CHROME_PATHS_H__
 
 #include "build/build_config.h"
 
 namespace base {
@@ skipping 87 matching lines @@
                                 // binary data (e.g., html files and images
                                 // used by internal pages).
   DIR_RESOURCES_EXTENSION,      // Full path to extension resources.
 #if defined(OS_CHROMEOS)
   DIR_CHROMEOS_WALLPAPERS,      // Directory where downloaded chromeos
                                 // wallpapers reside.
   DIR_CHROMEOS_WALLPAPER_THUMBNAILS,  // Directory where downloaded chromeos
                                       // wallpaper thumbnails reside.
   DIR_CHROMEOS_CUSTOM_WALLPAPERS,     // Directory where custom wallpapers
                                       // reside.
-  DIR_CHROMEOS_PPD_CACHE,             // Directory where printing drivers are
-                                      // cached.
 #endif
   DIR_SUPERVISED_USERS_DEFAULT_APPS,  // Directory where installer places .crx
                                       // files to be installed when managed user
                                       // session starts.
   DIR_SUPERVISED_USER_INSTALLED_WHITELISTS,  // Directory where sanitized
                                              // supervised user whitelists are
                                              // installed.
 #if defined(OS_LINUX) || defined(OS_MACOSX)
   DIR_NATIVE_MESSAGING,         // System directory where native messaging host
                                 // manifest files are stored.
@@ skipping 23 matching lines @@
 // Call once to register the provider for the path keys defined above.
 void RegisterPathProvider();
 
 // Get or set the invalid user data dir that was originally specified.
 void SetInvalidSpecifiedUserDataDir(const base::FilePath& user_data_dir);
 const base::FilePath& GetInvalidSpecifiedUserDataDir();
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_PATHS_H__