[Sync] Rename csync namespace to syncer

sync/util/cryptographer.h

Index: sync/util/cryptographer.h
diff --git a/sync/util/cryptographer.h b/sync/util/cryptographer.h
index 24dbf1b3f8dbfac600588a074120e33ca5cb0c9b..a27fc1d9133b76bd1c8437f8548f3257e4da9a25 100644
--- a/sync/util/cryptographer.h
+++ b/sync/util/cryptographer.h
@@ -18,7 +18,7 @@
 #include "sync/protocol/nigori_specifics.pb.h"
 #include "sync/util/nigori.h"
 
-namespace csync {
+namespace syncer {
 
 class Encryptor;
 
@@ -248,6 +248,6 @@ class Cryptographer {
   DISALLOW_COPY_AND_ASSIGN(Cryptographer);
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_UTIL_CRYPTOGRAPHER_H_