Media Galleries: Prune uninteresting folders when scanning.

chrome/browser/extensions/api/file_system/file_system_api.h

Index: chrome/browser/extensions/api/file_system/file_system_api.h
===================================================================
--- chrome/browser/extensions/api/file_system/file_system_api.h	(revision 253526)
+++ chrome/browser/extensions/api/file_system/file_system_api.h	(working copy)
@@ -5,14 +5,13 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_FILE_SYSTEM_FILE_SYSTEM_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_FILE_SYSTEM_FILE_SYSTEM_API_H_
 
+#include <vector>
+
+#include "base/files/file_path.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/common/extensions/api/file_system.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
-namespace base {
-class FilePath;
-}
-
 namespace extensions {
 class ExtensionPrefs;
 
@@ -30,6 +29,8 @@
                                  const std::string& extension_id,
                                  const base::FilePath& path);
 
+std::vector<base::FilePath> GetGrayListedDirectories();
+
 }  // namespace file_system_api
 
 class FileSystemGetDisplayPathFunction : public ChromeSyncExtensionFunction {