Adding `browsing_data_filesystem_helper*` as the first step towards content settings UI.

chrome/browser/browsing_data_file_system_helper_unittest.cc

+// Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/browsing_data_file_system_helper.h"
+#include "chrome/test/testing_browser_process_test.h"
+#include "chrome/test/testing_profile.h"
+
+namespace {
+
+typedef TestingBrowserProcessTest CannedBrowsingDataFileSystemHelperTest;
+
+TEST_F(CannedBrowsingDataFileSystemHelperTest, Empty) {
+  TestingProfile profile;
+
+  const GURL origin("http://host1:1/");
+
+  scoped_refptr<CannedBrowsingDataFileSystemHelper> helper(
+      new CannedBrowsingDataFileSystemHelper(&profile));
+
+  ASSERT_TRUE(helper->empty());
+  helper->AddFileSystem(origin, fileapi::kFileSystemTypeTemporary, 0);
+  ASSERT_FALSE(helper->empty());
+  helper->Reset();
+  ASSERT_TRUE(helper->empty());
+}
+
+}  // namespace