[Sync] Move //sync to //components/sync.

sync/test/fake_server/sessions_hierarchy.h

-// Copyright 2015 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 SYNC_TEST_FAKE_SERVER_SESSIONS_HIERARCHY_H_
-#define SYNC_TEST_FAKE_SERVER_SESSIONS_HIERARCHY_H_
-
-#include <set>
-#include <string>
-
-#include "base/macros.h"
-
-namespace fake_server {
-
-class SessionsHierarchy;
-
-// A representation of the Sync Sessions hierarchy (windows and the URLs of
-// their tabs).
-class SessionsHierarchy {
- public:
-  // Creates an empty (no windows) SessionsHierachy.
-  SessionsHierarchy();
-
-  ~SessionsHierarchy();
-
-  // Add a window to the builder with one tab.
-  void AddWindow(const std::string& tab);
-
-  // Add a window to the builder with multiple tabs.
-  void AddWindow(const std::multiset<std::string>& tabs);
-
-  // Creates and returns a human-readable string version of this object's data.
-  std::string ToString() const;
-
-  // Returns true when this object and |other| have equivalent data.
-  //
-  // Two SessionHierarchy objects A and B have equivalent data iff:
-  // 1) A and B contain the same number of Windows, and
-  // 2) Each Window of A is equal (as a multiset) to exactly one Window of B
-  //    (and vice versa).
-  //
-  // Examples of equivalent hierarchies:
-  //   {} and {}, {{X}} and {{X}}, {{X,Y}} and {{Y,X}}, {{X},{Y}} and {{Y},{X}}
-  // Examples of nonequivalent hierarchies:
-  //   {{X}} and {{Y}}, {{X}} and {{X,X}}, {{X}} and {{X},{X}}
-  bool Equals(const SessionsHierarchy& other) const;
-
- private:
-  // A collection of tab URLs.
-  typedef std::multiset<std::string> Window;
-
-  // A collection of Windows (an instance of this collection represents a
-  // sessions hierarchy).
-  typedef std::multiset<Window> WindowContainer;
-
-  // The windows of the sessions hierarchy.
-  WindowContainer windows_;
-};
-
-}  // namespace fake_server
-
-#endif  // SYNC_TEST_FAKE_SERVER_SESSIONS_HIERARCHY_H_