Take 2: sync changes to support encryption

chrome/browser/sync/util/cryptographer.cc

 // Copyright (c) 2010 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/util/cryptographer.h"
 
 namespace browser_sync {
 
-const char kNigoriTag[] = "nigori";
+const char kNigoriTag[] = "google_chrome_nigori";
 
 // We name a particular Nigori instance (ie. a triplet consisting of a hostname,
 // a username, and a password) by calling Permute on this string. Since the
 // output of Permute is always the same for a given triplet, clients will always
 // assign the same name to a particular triplet.
 const char kNigoriKeyName[] = "nigori-key";
 
-Cryptographer::Cryptographer() {
+Cryptographer::Cryptographer() : default_nigori_(NULL) {
 }
 
 bool Cryptographer::CanDecrypt(const sync_pb::EncryptedData& data) const {
   return nigoris_.end() != nigoris_.find(data.key_name());
 }
 
 bool Cryptographer::Encrypt(const ::google::protobuf::MessageLite& message,
                             sync_pb::EncryptedData* encrypted) const {
   DCHECK(encrypted);
   DCHECK(default_nigori_);
@@ skipping 120 matching lines @@
         continue;
       }
       nigoris_[key.name()] = make_linked_ptr(new_nigori.release());
     }
   }
   DCHECK(nigoris_.end() != nigoris_.find(default_key_name));
   default_nigori_ = &*nigoris_.find(default_key_name);
 }
 
 }  // namespace browser_sync