[Sync] Rename csync namespace to syncer

sync/util/test_unrecoverable_error_handler.h

Index: sync/util/test_unrecoverable_error_handler.h
diff --git a/sync/util/test_unrecoverable_error_handler.h b/sync/util/test_unrecoverable_error_handler.h
index 758ba79f3e953d2687ccdeadcf1ad1cd9660a909..bec0fc76f1cc1942dbd914fc46891ddc5ed80eb4 100644
--- a/sync/util/test_unrecoverable_error_handler.h
+++ b/sync/util/test_unrecoverable_error_handler.h
@@ -9,7 +9,7 @@
 #include "base/compiler_specific.h"
 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
 
-namespace csync {
+namespace syncer {
 
 // Implementation of UnrecoverableErrorHandler that simply adds a
 // gtest failure.
@@ -22,7 +22,7 @@ class TestUnrecoverableErrorHandler : public UnrecoverableErrorHandler {
                                     const std::string& message) OVERRIDE;
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_INCLUDES_TEST_UNRECOVERABLE_ERROR_HANDLER_H_