Serialize form_data in Gnome keyring password store service.

components/autofill/core/common/form_data.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_COMMON_FORM_DATA_H_
 #define COMPONENTS_AUTOFILL_CORE_COMMON_FORM_DATA_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
@@ skipping 26 matching lines @@
   // true if this form is a form tag.
   bool is_form_tag;
   // A vector of all the input fields in the form.
   std::vector<FormFieldData> fields;
 };
 
 // For testing.
 std::ostream& operator<<(std::ostream& os, const FormData& form);
 
 // Serialize FormData. Used by the PasswordManager to persist FormData
-// pertaining to password forms. Serialized data is appended to |pickle|
+// pertaining to password forms. Serialized data is appended to |pickle|.
 void SerializeFormData(const FormData& form_data, Pickle* pickle);
 // Deserialize FormData. This assumes that |iter| is currently pointing to
 // the part of a pickle created by SerializeFormData. Returns true on success.
 bool DeserializeFormData(PickleIterator* iter, FormData* form_data);
 
+// Serialize FormData. Used by the PasswordManager to persist FormData
+// pertaining to password forms in base64 string. It is useful since in some
+// cases we need to store C strings without embedded '\0' symbols.
+void SerializeFormDataToBase64String(const FormData& form_data,
+                                     std::string* output);
+// Deserialize FormData. Returns true on success.
+bool DeserializeFormDataFromBase64String(const base::StringPiece& input,
+                                         FormData* form_data);
+
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_COMMON_FORM_DATA_H_