Revert 75287 - [Sync] Initial support for encrypting any datatype (no UI hook...

chrome/browser/sync/util/cryptographer.h

Index: chrome/browser/sync/util/cryptographer.h
===================================================================
--- chrome/browser/sync/util/cryptographer.h	(revision 75295)
+++ chrome/browser/sync/util/cryptographer.h	(working copy)
@@ -71,10 +71,6 @@
   bool Decrypt(const sync_pb::EncryptedData& encrypted,
                ::google::protobuf::MessageLite* message) const;
 
-  // Decrypts |encrypted| and returns plaintext decrypted data. If decryption
-  // fails, returns empty string.
-  std::string DecryptToString(const sync_pb::EncryptedData& encrypted) const;
-
   // Encrypts the set of currently known keys into |encrypted|. Returns true if
   // successful.
   bool GetKeys(sync_pb::EncryptedData* encrypted) const;