[Sync] Rename csync namespace to syncer

sync/engine/throttled_data_type_tracker_unittest.cc

Index: sync/engine/throttled_data_type_tracker_unittest.cc
diff --git a/sync/engine/throttled_data_type_tracker_unittest.cc b/sync/engine/throttled_data_type_tracker_unittest.cc
index 6273915bb0277a8c0ef583aba0812fcb9d737115..20b7237a4c2e454adb8c83f8c1eda2bd4eb81081 100644
--- a/sync/engine/throttled_data_type_tracker_unittest.cc
+++ b/sync/engine/throttled_data_type_tracker_unittest.cc
@@ -10,7 +10,7 @@
 using base::TimeDelta;
 using base::TimeTicks;
 
-namespace csync {
+namespace syncer {
 
 TEST(ThrottledDataTypeTrackerTest, AddUnthrottleTimeTest) {
   const syncable::ModelTypeSet types(syncable::BOOKMARKS, syncable::PASSWORDS);
@@ -63,5 +63,5 @@ TEST(ThrottledDataTypeTrackerTest, UnthrottleSomeTypesTest) {
   EXPECT_TRUE(throttler.GetThrottledTypes().Equals(long_throttled));
 }
 
-}  // namespace csync
+}  // namespace syncer