[Sync] Rename csync namespace to syncer

sync/internal_api/public/change_record.h

Index: sync/internal_api/public/change_record.h
diff --git a/sync/internal_api/public/change_record.h b/sync/internal_api/public/change_record.h
index 90a21a0a310b822317b25a468b9e38c374572969..5b27285277ad799ba1a3f9c52fd2c72f99a63d4e 100644
--- a/sync/internal_api/public/change_record.h
+++ b/sync/internal_api/public/change_record.h
@@ -17,7 +17,7 @@ namespace base {
 class DictionaryValue;
 }  // namespace base
 
-namespace csync {
+namespace syncer {
 
 // TODO(zea): One day get passwords playing nicely with the rest of encryption
 // and get rid of this.
@@ -60,8 +60,8 @@ struct ChangeRecord {
 
 typedef std::vector<ChangeRecord> ChangeRecordList;
 
-typedef csync::Immutable<ChangeRecordList> ImmutableChangeRecordList;
+typedef syncer::Immutable<ChangeRecordList> ImmutableChangeRecordList;
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_CHANGE_RECORD_H_