Media Galleries: Prune uninteresting folders when scanning.

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

 // 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.
 
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
 
 #include "apps/app_window.h"
 #include "apps/app_window_registry.h"
 #include "apps/saved_files_service.h"
 #include "base/bind.h"
@@ skipping 228 matching lines @@
 }
 
 void SetLastChooseEntryDirectory(ExtensionPrefs* prefs,
                                  const std::string& extension_id,
                                  const base::FilePath& path) {
   prefs->UpdateExtensionPref(extension_id,
                              kLastChooseEntryDirectory,
                              base::CreateFilePathValue(path));
 }
 
+std::vector<base::FilePath> GetGrayListedDirectories() {
+  std::vector<base::FilePath> graylisted_directories;
+  for (size_t i = 0; i < arraysize(kGraylistedPaths); ++i) {
+    base::FilePath graylisted_path;
+    if (PathService::Get(kGraylistedPaths[i], &graylisted_path))
+      graylisted_directories.push_back(graylisted_path);
+  }
+  return graylisted_directories;
+}
+
 }  // namespace file_system_api
 
 bool FileSystemGetDisplayPathFunction::RunImpl() {
   std::string filesystem_name;
   std::string filesystem_path;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &filesystem_name));
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &filesystem_path));
 
   base::FilePath file_path;
   if (!app_file_handler_util::ValidateFileEntryAndGetPath(filesystem_name,
@@ skipping 708 matching lines @@
   if (needs_new_entry) {
     is_directory_ = file_entry->is_directory;
     CreateResponse();
     AddEntryToResponse(file_entry->path, file_entry->id);
   }
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions