(For-try) Divide recursive Copy/Move into multiple async tasks

webkit/fileapi/syncable/syncable_file_system_unittest.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 "base/stl_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_task_runners.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/fileapi/isolated_context.h"
@@ skipping 250 matching lines @@
 
   operation_context.reset(other_file_system_.NewOperationContext());
   operation_context->set_allowed_bytes_growth(1024);
   EXPECT_EQ(base::PLATFORM_FILE_OK,
             other_file_system_.file_util()->EnsureFileExists(
                 operation_context.get(), kSrcChild, &created));
   EXPECT_TRUE(created);
 
   // Now try copying the directory into the syncable file system, which should
   // fail if directory operation is disabled. (http://crbug.com/161442)
-  EXPECT_EQ(base::PLATFORM_FILE_ERROR_INVALID_OPERATION,
+  EXPECT_NE(base::PLATFORM_FILE_OK,
             file_system_.Copy(kSrcDir, URL("dest")));
 
   other_file_system_.TearDown();
 }
 
 }  // namespace fileapi