Application shortcuts in Linux are now installed into a "Chrome Apps" folder.

chrome/browser/shell_integration_linux.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_BROWSER_SHELL_INTEGRATION_LINUX_H_
 #define CHROME_BROWSER_SHELL_INTEGRATION_LINUX_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 53 matching lines @@
 std::string GetDesktopFileContents(const base::FilePath& chrome_exe_path,
                                    const std::string& app_name,
                                    const GURL& url,
                                    const std::string& extension_id,
                                    const base::FilePath& extension_path,
                                    const string16& title,
                                    const std::string& icon_name,
                                    const base::FilePath& profile_path,
                                    bool no_display);
 
+// Returns contents for .directory file named |title| with icon |icon_name|. If
+// |icon_name| is empty, will use the Chrome icon.
+std::string GetDirectoryFileContents(const string16& title,
+                                     const std::string& icon_name);
 
 // Create shortcuts on the desktop or in the application menu (as specified by
 // |shortcut_info|), for the web page or extension in |shortcut_info|.
 // For extensions, duplicate shortcuts are avoided, so if a requested shortcut
 // already exists it is deleted first.
 bool CreateDesktopShortcut(
     const ShellIntegration::ShortcutInfo& shortcut_info,
     const ShellIntegration::ShortcutLocations& creation_locations);
 
 // Delete any desktop shortcuts on desktop or in the application menu that have
 // been added for the extension with |extension_id| in |profile_path|.
 void DeleteDesktopShortcuts(const base::FilePath& profile_path,
                             const std::string& extension_id);
 
 }  // namespace ShellIntegrationLinux
 
 #endif  // CHROME_BROWSER_SHELL_INTEGRATION_LINUX_H_