[Sync] Rename csync namespace to syncer

sync/internal_api/public/util/enum_set.h

Index: sync/internal_api/public/util/enum_set.h
diff --git a/sync/internal_api/public/util/enum_set.h b/sync/internal_api/public/util/enum_set.h
index 1a989edfd465761215837ffc6feb0e641a019a41..911ad125f37764070a5acb2ed973b6d82c72a237 100644
--- a/sync/internal_api/public/util/enum_set.h
+++ b/sync/internal_api/public/util/enum_set.h
@@ -13,7 +13,7 @@
 #include "base/basictypes.h"
 #include "base/logging.h"
 
-namespace csync {
+namespace syncer {
 
 // Forward declarations needed for friend declarations.
 template <typename E, E MinEnumValue, E MaxEnumValue>
@@ -281,6 +281,6 @@ EnumSet<E, Min, Max> Difference(EnumSet<E, Min, Max> set1,
   return EnumSet<E, Min, Max>(set1.enums_ & ~set2.enums_);
 }
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_UTIL_ENUM_SET_H_