[Sync] Relax EnumSet semantics for some functions

chrome/browser/sync/engine/nigori_util.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/engine/nigori_util.h"
 
 #include <queue>
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
   // the data, nor for determining if data is encrypted. We simply ensure it has
   // been overwritten to avoid any possible leaks of sensitive data.
   return SpecificsNeedsEncryption(encrypted_types, entry.Get(SPECIFICS)) ||
          (encrypted_types.Has(type) &&
           entry.Get(NON_UNIQUE_NAME) != kEncryptedString);
 }
 
 bool SpecificsNeedsEncryption(ModelEnumSet encrypted_types,
                               const sync_pb::EntitySpecifics& specifics) {
   const ModelType type = GetModelTypeFromSpecifics(specifics);
-  if (!syncable::IsRealDataType(type))
-    return false;
   if (type == PASSWORDS || type == NIGORI)
     return false;  // These types have their own encryption schemes.
   if (!encrypted_types.Has(type))
     return false;  // This type does not require encryption
   return !specifics.has_encrypted();
 }
 
 // Mainly for testing.
 bool VerifyDataTypeEncryptionForTest(
     BaseTransaction* const trans,
@@ skipping 54 matching lines @@
           return false;
       }
     }
     // Push the successor.
     to_visit.push(child.Get(NEXT_ID));
   }
   return true;
 }
 
 }  // namespace syncable