[Sync] Rename csync namespace to syncer

sync/internal_api/public/read_transaction.h

Index: sync/internal_api/public/read_transaction.h
diff --git a/sync/internal_api/public/read_transaction.h b/sync/internal_api/public/read_transaction.h
index ba5610b9d5453180a0ff0d446b6a84825c29f202..0a857694e7382ba4a06e91d26b6849b167f6dc46 100644
--- a/sync/internal_api/public/read_transaction.h
+++ b/sync/internal_api/public/read_transaction.h
@@ -12,7 +12,7 @@ namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
-namespace csync {
+namespace syncer {
 
 struct UserShare;
 
@@ -41,6 +41,6 @@ class ReadTransaction : public BaseTransaction {
   DISALLOW_COPY_AND_ASSIGN(ReadTransaction);
 };
 
-} // namespace csync
+} // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_