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

chrome/browser/chromeos/gdata/gdata_file_system.cc

Index: chrome/browser/chromeos/gdata/gdata_file_system.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.cc b/chrome/browser/chromeos/gdata/gdata_file_system.cc
index 46dc991fd2d273686bd96eeb72eb9a262a65d1b0..668bc06bd158bcef73cc187e142bc54f9a47864d 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.cc
@@ -1097,6 +1097,10 @@ 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();
@@ -1983,8 +1987,9 @@ 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.