drive: Support offline delete

chrome/browser/chromeos/drive/resource_metadata.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/drive/resource_metadata.h"
 
 #include "base/guid.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
@@ skipping 266 matching lines @@
 FileError ResourceMetadata::ReadDirectoryByPath(
     const base::FilePath& path,
     ResourceEntryVector* out_entries) {
   DCHECK(blocking_task_runner_->RunsTasksOnCurrentThread());
   DCHECK(out_entries);
 
   std::string id;
   FileError error = GetIdByPath(path, &id);
   if (error != FILE_ERROR_OK)
     return error;
+  return ReadDirectoryById(id, out_entries);
+}
+
+FileError ResourceMetadata::ReadDirectoryById(
+    const std::string& id,
+    ResourceEntryVector* out_entries) {
+  DCHECK(blocking_task_runner_->RunsTasksOnCurrentThread());
+  DCHECK(out_entries);
 
   ResourceEntry entry;
-  error = GetResourceEntryById(id, &entry);
+  FileError error = GetResourceEntryById(id, &entry);
   if (error != FILE_ERROR_OK)
     return error;
 
   if (!entry.file_info().is_directory())
     return FILE_ERROR_NOT_A_DIRECTORY;
 
   std::vector<std::string> children;
   storage_->GetChildren(id, &children);
 
   ResourceEntryVector entries(children.size());
@@ skipping 157 matching lines @@
     for (size_t i = 0; i < children.size(); ++i) {
       if (!RemoveEntryRecursively(children[i]))
         return false;
     }
   }
   return storage_->RemoveEntry(id);
 }
 
 }  // namespace internal
 }  // namespace drive