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 "base/bind.h"
 #include "base/eintr_wrapper.h"
@@ skipping 2121 matching lines @@
     return base::PLATFORM_FILE_ERROR_NOT_FOUND;
 
   return base::PLATFORM_FILE_OK;
 }
 
 //===================== GDataFileSystem: Cache entry points ====================
 
 FilePath GDataFileSystem::GetCacheFilePath(const std::string& resource_id,
                                            const std::string& md5,
                                            CacheSubdir subdir_id,
-                                           CachedFileOrigin file_origin) {
+                                           CachedFileOrigin file_origin) const {
   DCHECK(subdir_id != 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(subdir_id == CACHE_TYPE_PERSISTENT);
     base_name += FilePath::kExtensionSeparator;
     base_name += kLocallyModifiedFileExtension;
   } else if (!md5.empty()) {
@@ skipping 360 matching lines @@
 ProfileKeyedService* GDataFileSystemFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   GDataFileSystem* file_system = new GDataFileSystem(profile,
                                                      new DocumentsService,
                                                      new GDataSyncClient);
   file_system->Initialize();
   return file_system;
 }
 
 }  // namespace gdata