Linux: Use the same safe downloads logic as Windows.

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__
 #pragma once
 
 #include "build/build_config.h"
 
 // This file declares path keys for the chrome module.  These can be used with
 // the PathService to access various special directories and files.
 
 namespace chrome {
 
 enum {
   PATH_START = 1000,
 
   DIR_APP = PATH_START,         // Directory where dlls and data reside.
   DIR_LOGS,                     // Directory where logs should be written.
   DIR_USER_DATA,                // Directory where user data can be written.
   DIR_CRASH_DUMPS,              // Directory where crash dumps are written.
   DIR_USER_DESKTOP,             // Directory that correspond to the desktop.
   DIR_RESOURCES,                // Directory containing separate file resources
                                 // used by Chrome at runtime.
   DIR_INSPECTOR,                // Directory where web inspector is located.
   DIR_APP_DICTIONARIES,         // Directory where the global dictionaries are.
   DIR_USER_DOCUMENTS,           // Directory for a user's "My Documents".
   DIR_DEFAULT_DOWNLOADS_SAFE,   // Directory for a user's
-                                // "My Documents/Downloads".
+                                // "My Documents/Downloads", (Windows) or
+                                // "Downloads". (Linux)
   DIR_DEFAULT_DOWNLOADS,        // Directory for a user's downloads.
   DIR_USER_DATA_TEMP,           // A temp directory within DIR_USER_DATA.  Use
                                 // this when a temporary file or directory will
                                 // be moved into the profile, to avoid issues
                                 // moving across volumes.  See crbug.com/13044 .
                                 // Getting this path does not create it.  Users
                                 // should check that the path exists before
                                 // using it.
   DIR_INTERNAL_PLUGINS,         // Directory where internal plugins reside.
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
@@ skipping 58 matching lines @@
 
   PATH_END
 };
 
 // Call once to register the provider for the path keys defined above.
 void RegisterPathProvider();
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_PATHS_H__