[Sync] Fix namespaces for the sync_sessions component.

chrome/browser/sync/glue/session_sync_test_helper.h

-// Copyright 2013 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 CHROME_BROWSER_SYNC_GLUE_SESSION_SYNC_TEST_HELPER_H_
-#define CHROME_BROWSER_SYNC_GLUE_SESSION_SYNC_TEST_HELPER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "components/sessions/core/session_id.h"
-
-namespace sync_driver {
-struct SyncedSession;
-}
-
-namespace sync_pb {
-class SessionSpecifics;
-}
-
-namespace browser_sync {
-
-class SessionSyncTestHelper {
- public:
-  SessionSyncTestHelper() : max_tab_node_id_(0) {}
-
-  static void BuildSessionSpecifics(const std::string& tag,
-                                    sync_pb::SessionSpecifics* meta);
-
-  static void AddWindowSpecifics(int window_id,
-                                 const std::vector<int>& tab_list,
-                                 sync_pb::SessionSpecifics* meta);
-
-  static void VerifySyncedSession(
-      const std::string& tag,
-      const std::vector<std::vector<SessionID::id_type>>& windows,
-      const sync_driver::SyncedSession& session);
-
-  // Build a SessionSpecifics object with a tab and sample data. Uses a
-  // monotonically increasing variable to generate tab_node_ids and avoid
-  // conflicts.
-  void BuildTabSpecifics(const std::string& tag,
-                         int window_id,
-                         int tab_id,
-                         sync_pb::SessionSpecifics* tab_base);
-
-  // Overload of BuildTabSpecifics to allow forcing a specific tab_node_id.
-  // Typically only useful to test reusing tab_node_ids.
-  void BuildTabSpecifics(const std::string& tag,
-                         int window_id,
-                         int tab_id,
-                         int tab_node_id,
-                         sync_pb::SessionSpecifics* tab_base);
-
-  sync_pb::SessionSpecifics BuildForeignSession(
-      const std::string& tag,
-      const std::vector<SessionID::id_type>& tab_list,
-      std::vector<sync_pb::SessionSpecifics>* tabs);
-
-  void Reset();
-
- private:
-  int max_tab_node_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(SessionSyncTestHelper);
-};
-
-}  // namespace browser_sync
-
-#endif  // CHROME_BROWSER_SYNC_GLUE_SESSION_SYNC_TEST_HELPER_H_