Grant file access permissions for cached file paths to file browsers/handlers.

chrome/browser/chromeos/gdata/gdata_file_system.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/chromeos/gdata/gdata_file_system.h"
 
 #include <errno.h>
 
 #include <utility>
 
@@ skipping 1079 matching lines @@
 }
 
 FilePath GDataFileSystem::GetGDataTempDownloadFolderPath() const {
   return cache_paths_[GDataRootDirectory::CACHE_TYPE_TMP_DOWNLOADS];
 }
 
 FilePath GDataFileSystem::GetGDataCachePinnedDirectory() const {
   return cache_paths_[GDataRootDirectory::CACHE_TYPE_PINNED];
 }
 
+FilePath GDataFileSystem::GetGDataCachePersistentDirectory() const {
+  return cache_paths_[GDataRootDirectory::CACHE_TYPE_PERSISTENT];
+}
+
 GDataFileBase* GDataFileSystem::GetGDataFileInfoFromPath(
     const FilePath& file_path) {
   lock_.AssertAcquired();
   // Find directory element within the cached file system snapshot.
   ReadOnlyFindFileDelegate find_delegate;
   UnsafeFindFileByPath(file_path, &find_delegate);
   return find_delegate.file();
 }
 
 void GDataFileSystem::GetFromCacheForPath(
@@ skipping 866 matching lines @@
   StoreToCache(resource_id, md5, file_content_path, CacheOperationCallback());
 }
 
 
 //===================== GDataFileSystem: Cache entry points ====================
 
 FilePath GDataFileSystem::GetCacheFilePath(
     const std::string& resource_id,
     const std::string& md5,
     GDataRootDirectory::CacheSubDirectoryType sub_dir_type,
-    CachedFileOrigin file_origin) {
+    CachedFileOrigin file_origin) const {
   DCHECK(sub_dir_type != GDataRootDirectory::CACHE_TYPE_META);
+
   // Runs on any thread.
   // Filename is formatted as resource_id.md5, i.e. resource_id is the base
   // name and md5 is the extension.
   std::string base_name = GDataFileBase::EscapeUtf8FileName(resource_id);
   if (file_origin == CACHED_FILE_LOCALLY_MODIFIED) {
     DCHECK(sub_dir_type == GDataRootDirectory::CACHE_TYPE_PERSISTENT);
     base_name += FilePath::kExtensionSeparator;
     base_name += kLocallyModifiedFileExtension;
   } else if (!md5.empty()) {
     base_name += FilePath::kExtensionSeparator;
@@ skipping 653 matching lines @@
     const base::Closure& task) {
   return BrowserThread::PostBlockingPoolSequencedTask(
       sequence_token_name,
       from_here,
       base::Bind(&GDataFileSystem::RunTaskOnIOThreadPool,
                  base::Unretained(this),
                  task));
 }
 
 }  // namespace gdata