[Sync] The cryptographer should be able to handle empty or old nigori nodes.

chrome/browser/sync/util/cryptographer.cc

Index: chrome/browser/sync/util/cryptographer.cc
diff --git a/chrome/browser/sync/util/cryptographer.cc b/chrome/browser/sync/util/cryptographer.cc
index f7ac50e334f10a1360b740cde4bfcdb7a463c0ab..4990d8b9f275f353de6ba7ef9e92263eada4ea19 100644
--- a/chrome/browser/sync/util/cryptographer.cc
+++ b/chrome/browser/sync/util/cryptographer.cc
@@ -386,7 +386,7 @@ void Cryptographer::SetEncryptedTypes(
   if (encrypted_types_ == encrypted_types) {

[akalin, 2011/11/17 03:09:20]

should be:

if (std::includes(encrypted_types_.begin(), ..., encrypted_types.begin() ...)) {
  return;
}

[Nicolas Zea, 2011/11/17 05:10:00]

Done.

     return;
   }
-  encrypted_types_ = encrypted_types;
+  encrypted_types_.insert(encrypted_types.begin(), encrypted_types.end());
   EmitEncryptedTypesChangedNotification();
 }