[Sync] Rename csync namespace to syncer

sync/engine/get_commit_ids_command.h

Index: sync/engine/get_commit_ids_command.h
diff --git a/sync/engine/get_commit_ids_command.h b/sync/engine/get_commit_ids_command.h
index 5d9117fe7a907259f1edb62fcb5c145063217212..f6b8a6693b3b830dd9724212b76d4e98a65cd922 100644
--- a/sync/engine/get_commit_ids_command.h
+++ b/sync/engine/get_commit_ids_command.h
@@ -19,7 +19,7 @@
 using std::pair;
 using std::vector;
 
-namespace csync {
+namespace syncer {
 
 // A class that contains the code used to search the syncable::Directory for
 // locally modified items that are ready to be committed to the server.
@@ -135,6 +135,6 @@ class GetCommitIdsCommand : public SyncerCommand {
   DISALLOW_COPY_AND_ASSIGN(GetCommitIdsCommand);
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_ENGINE_GET_COMMIT_IDS_COMMAND_H_