Move browser-side File API unittests next to the files they cover.

content/test/fileapi_test_file_set.h

-// Copyright 2014 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.
-
-#ifndef CONTENT_TEST_FILEAPI_TEST_FILE_SET_H_
-#define CONTENT_TEST_FILEAPI_TEST_FILE_SET_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <set>
-
-#include "base/files/file_path.h"
-
-// Common test data structures and test cases.
-
-namespace content {
-
-struct FileSystemTestCaseRecord {
-  bool is_directory;
-  const base::FilePath::CharType path[64];
-  int64_t data_file_size;
-};
-
-extern const FileSystemTestCaseRecord kRegularFileSystemTestCases[];
-extern const size_t kRegularFileSystemTestCaseSize;
-
-size_t GetRegularFileSystemTestCaseSize();
-
-// Creates one file or directory specified by |record|.
-void SetUpOneFileSystemTestCase(const base::FilePath& root_path,
-                                const FileSystemTestCaseRecord& record);
-
-// Creates the files and directories specified in kRegularTestCases.
-void SetUpRegularFileSystemTestCases(const base::FilePath& root_path);
-
-}  // namespace content
-
-#endif  // CONTENT_TEST_FILEAPI_TEST_FILE_SET_H_