[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/engine_impl/cycle/mock_debug_info_getter.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 COMPONENTS_SYNC_TEST_SESSIONS_MOCK_DEBUG_INFO_GETTER_H_
-#define COMPONENTS_SYNC_TEST_SESSIONS_MOCK_DEBUG_INFO_GETTER_H_
+#ifndef COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_MOCK_DEBUG_INFO_GETTER_H_
+#define COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_MOCK_DEBUG_INFO_GETTER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "components/sync/engine_impl/cycle/debug_info_getter.h"
 #include "components/sync/protocol/sync.pb.h"
-#include "components/sync/sessions_impl/debug_info_getter.h"
 
 namespace syncer {
-namespace sessions {
 
 // A mock implementation of DebugInfoGetter to be used in tests. Events added by
 // AddDebugEvent are accessible via DebugInfoGetter methods.
-class MockDebugInfoGetter : public sessions::DebugInfoGetter {
+class MockDebugInfoGetter : public DebugInfoGetter {
  public:
   MockDebugInfoGetter();
   ~MockDebugInfoGetter() override;
 
   // DebugInfoGetter implementation.
   void GetDebugInfo(sync_pb::DebugInfo* debug_info) override;
   void ClearDebugInfo() override;
 
   void AddDebugEvent();
 
  private:
   sync_pb::DebugInfo debug_info_;
 
   DISALLOW_COPY_AND_ASSIGN(MockDebugInfoGetter);
 };
 
-}  // namespace sessions
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_TEST_SESSIONS_MOCK_DEBUG_INFO_GETTER_H_
+#endif  // COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_MOCK_DEBUG_INFO_GETTER_H_