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

components/sync/test/engine/mock_update_handler.h

Index: components/sync/test/engine/mock_update_handler.h
diff --git a/components/sync/test/engine/mock_update_handler.h b/components/sync/test/engine/mock_update_handler.h
index 6d3d9eaf28fa8bb3ec7b4eb8656cbfeb02874d51..38c8d3f86a2d8fc6de71b988d482f19327bd8e52 100644
--- a/components/sync/test/engine/mock_update_handler.h
+++ b/components/sync/test/engine/mock_update_handler.h
@@ -26,9 +26,9 @@ class MockUpdateHandler : public UpdateHandler {
       const sync_pb::DataTypeProgressMarker& progress_marker,
       const sync_pb::DataTypeContext& mutated_context,
       const SyncEntityList& applicable_updates,
-      sessions::StatusController* status) override;
-  void ApplyUpdates(sessions::StatusController* status) override;
-  void PassiveApplyUpdates(sessions::StatusController* status) override;
+      StatusController* status) override;
+  void ApplyUpdates(StatusController* status) override;
+  void PassiveApplyUpdates(StatusController* status) override;
 
   // Returns the number of times ApplyUpdates() was invoked.
   int GetApplyUpdatesCount();