[Sync] Rename csync namespace to syncer

sync/internal_api/public/util/experiments.h

Index: sync/internal_api/public/util/experiments.h
diff --git a/sync/internal_api/public/util/experiments.h b/sync/internal_api/public/util/experiments.h
index f13c09ad0200552e9946539ed6fa3d5488fba952..c6febe867569587bf44c896f7a14815f7aa9da60 100644
--- a/sync/internal_api/public/util/experiments.h
+++ b/sync/internal_api/public/util/experiments.h
@@ -8,7 +8,7 @@
 
 #include "sync/internal_api/public/syncable/model_type.h"
 
-namespace csync {
+namespace syncer {
 
 // A structure to hold the enable status of experimental sync features.
 struct Experiments {
@@ -23,6 +23,6 @@ struct Experiments {
   bool sync_tab_favicons;
 };
 
-}
+}  // namespace syncer
 
 #endif  // SYNC_UTIL_EXPERIMENTS_