sync: Move MarkForSyncing to mutable_entry.cc

sync/syncable/syncable_util.cc

Index: sync/syncable/syncable_util.cc
diff --git a/sync/syncable/syncable_util.cc b/sync/syncable/syncable_util.cc
index b4829cf8786fdcaf4cce7f3ab300252827459ebe..1bfe6ff960bd98f6c1b97118da692c243d276c17 100644
--- a/sync/syncable/syncable_util.cc
+++ b/sync/syncable/syncable_util.cc
@@ -44,16 +44,6 @@ bool IsLegalNewParent(BaseTransaction* trans, const Id& entry_id,
   return true;
 }
 
-// This function sets only the flags needed to get this entry to sync.
-bool MarkForSyncing(MutableEntry* e) {
-  DCHECK_NE(static_cast<MutableEntry*>(NULL), e);
-  DCHECK(!e->IsRoot()) << "We shouldn't mark a permanent object for syncing.";
-  if (!(e->Put(IS_UNSYNCED, true)))
-    return false;
-  e->Put(SYNCING, false);
-  return true;
-}
-
 void ChangeEntryIDAndUpdateChildren(
     WriteTransaction* trans,
     MutableEntry* entry,