[Sync] Address msw's comments for r149747

sync/notifier/sync_notifier.h

Index: sync/notifier/sync_notifier.h
diff --git a/sync/notifier/sync_notifier.h b/sync/notifier/sync_notifier.h
index 48bc1f10b44630cda2be44f39fbb6b11ce1f8f34..80b97b892741fedfa11df17a0c645389d27a5aa9 100644
--- a/sync/notifier/sync_notifier.h
+++ b/sync/notifier/sync_notifier.h
@@ -22,10 +22,9 @@ class SyncNotifier {
   SyncNotifier() {}
   virtual ~SyncNotifier() {}
 
-  // Updates the set of ObjectIds associated with a given
-  // |handler|. Passing an empty ObjectIdSet will unregister
-  // |handler|. There should be at most one handler registered per
-  // object id.
+  // Updates the set of ObjectIds associated with a given |handler|.
+  // Passing an empty ObjectIdSet will unregister |handler|.
+  // There should be at most one handler registered per object id.
   virtual void UpdateRegisteredIds(SyncNotifierObserver* handler,
                                    const ObjectIdSet& ids) = 0;