[Sync] Rename csync namespace to syncer

sync/internal_api/read_node.cc

Index: sync/internal_api/read_node.cc
diff --git a/sync/internal_api/read_node.cc b/sync/internal_api/read_node.cc
index 019ba1d75c8392bff8405035650ea63c7e9fd6b5..6f7fc3578cefbfaad57fbe7a2dae68ab117896f2 100644
--- a/sync/internal_api/read_node.cc
+++ b/sync/internal_api/read_node.cc
@@ -9,7 +9,7 @@
 #include "sync/syncable/base_transaction.h"
 #include "sync/syncable/entry.h"
 
-namespace csync {
+namespace syncer {
 
 //////////////////////////////////////////////////////////////////////////
 // ReadNode member definitions
@@ -95,4 +95,4 @@ BaseNode::InitByLookupResult ReadNode::InitByTagLookup(
   return DecryptIfNecessary() ? INIT_OK : INIT_FAILED_DECRYPT_IF_NECESSARY;
 }
 
-}  // namespace csync
+}  // namespace syncer