[Sync] Rename csync namespace to syncer

sync/engine/apply_updates_command_unittest.cc

Index: sync/engine/apply_updates_command_unittest.cc
diff --git a/sync/engine/apply_updates_command_unittest.cc b/sync/engine/apply_updates_command_unittest.cc
index 5e43d0af5b9ad3e23bec604680f88d1df210fa3f..7f9e47527d9de0618e77ab7889ea6b663bffa62d 100644
--- a/sync/engine/apply_updates_command_unittest.cc
+++ b/sync/engine/apply_updates_command_unittest.cc
@@ -27,7 +27,7 @@
 #include "sync/util/cryptographer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace csync {
+namespace syncer {
 
 using sessions::SyncSession;
 using std::string;
@@ -380,7 +380,7 @@ TEST_F(ApplyUpdatesCommandTest, DecryptablePassword) {
     cryptographer = directory()->GetCryptographer(&trans);
   }
 
-  csync::KeyParams params = {"localhost", "dummy", "foobar"};
+  syncer::KeyParams params = {"localhost", "dummy", "foobar"};
   cryptographer->AddKey(params);
 
   sync_pb::EntitySpecifics specifics;
@@ -856,4 +856,4 @@ TEST_F(ApplyUpdatesCommandTest, CannotEncryptUnsyncedChanges) {
   }
 }
 
-}  // namespace csync
+}  // namespace syncer