drive: CreateDirectory should only wait for its parent directory's load.

chrome/browser/chromeos/drive/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/drive/file_system.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/platform_file.h"
@@ skipping 437 matching lines @@
 }
 
 void FileSystem::CreateDirectory(
     const base::FilePath& directory_path,
     bool is_exclusive,
     bool is_recursive,
     const FileOperationCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
-  change_list_loader_->LoadIfNeeded(
-      internal::DirectoryFetchInfo(),
+  // Ensure its parent directory is loaded to the local metadata.
+  LoadDirectoryIfNeeded(
+      directory_path.DirName(),
       base::Bind(&FileSystem::CreateDirectoryAfterLoad,
                  weak_ptr_factory_.GetWeakPtr(),
                  directory_path, is_exclusive, is_recursive, callback));
 }
 
 void FileSystem::CreateDirectoryAfterLoad(
     const base::FilePath& directory_path,
     bool is_exclusive,
     bool is_recursive,
     const FileOperationCallback& callback,
@@ skipping 615 matching lines @@
   if (util::IsSpecialResourceId(id))
     return;
 
   util::Log(logging::LOG_INFO,
             "Thumbnail refresh for %s", directory_path.AsUTF8Unsafe().c_str());
   change_list_loader_->LoadDirectoryFromServer(
       id, base::Bind(&util::EmptyFileOperationCallback));
 }
 
 }  // namespace drive