[Sync] Rename csync namespace to syncer

sync/engine/sync_scheduler_whitebox_unittest.cc

Index: sync/engine/sync_scheduler_whitebox_unittest.cc
diff --git a/sync/engine/sync_scheduler_whitebox_unittest.cc b/sync/engine/sync_scheduler_whitebox_unittest.cc
index b6e32344c104eddc94ea23b75b8ec707f0f03f12..7fb53be79dbd5954bbf6a919502f1832b8857309 100644
--- a/sync/engine/sync_scheduler_whitebox_unittest.cc
+++ b/sync/engine/sync_scheduler_whitebox_unittest.cc
@@ -18,8 +18,8 @@
 using base::TimeDelta;
 using base::TimeTicks;
 
-namespace csync {
-using csync::Syncer;
+namespace syncer {
+using syncer::Syncer;
 using sessions::SyncSession;
 using sessions::SyncSessionContext;
 using sessions::SyncSourceInfo;
@@ -265,4 +265,4 @@ TEST_F(SyncSchedulerWhiteboxTest, ContinueCanaryJobConfig) {
   EXPECT_EQ(decision, SyncScheduler::CONTINUE);
 }
 
-}  // namespace csync
+}  // namespace syncer