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

components/sync/engine_impl/cycle/debug_info_getter.h

Index: components/sync/engine_impl/cycle/debug_info_getter.h
diff --git a/components/sync/sessions_impl/debug_info_getter.h b/components/sync/engine_impl/cycle/debug_info_getter.h
similarity index 75%
rename from components/sync/sessions_impl/debug_info_getter.h
rename to components/sync/engine_impl/cycle/debug_info_getter.h
index 537d4956632cef7b2211eca062eb8b60d3692357..6e75fccd87724828146fd2a06c29ec9867e119e1 100644
--- a/components/sync/sessions_impl/debug_info_getter.h
+++ b/components/sync/engine_impl/cycle/debug_info_getter.h
@@ -2,13 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNC_SESSIONS_IMPL_DEBUG_INFO_GETTER_H_
-#define COMPONENTS_SYNC_SESSIONS_IMPL_DEBUG_INFO_GETTER_H_
+#ifndef COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_DEBUG_INFO_GETTER_H_
+#define COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_DEBUG_INFO_GETTER_H_
 
 #include "components/sync/protocol/sync.pb.h"
 
 namespace syncer {
-namespace sessions {
 
 // This is the interface that needs to be implemented by the event listener
 // to communicate the debug info data to the syncer.
@@ -24,7 +23,6 @@ class DebugInfoGetter {
   virtual ~DebugInfoGetter() {}
 };
 
-}  // namespace sessions
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_SESSIONS_IMPL_DEBUG_INFO_GETTER_H_
+#endif  // COMPONENTS_SYNC_ENGINE_IMPL_CYCLE_DEBUG_INFO_GETTER_H_