[Password Manager] Fix possible crash when updating imported credentials.

components/password_manager/core/browser/login_database.cc

 // Copyright 2014 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 "components/password_manager/core/browser/login_database.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/files/file_path.h"
@@ skipping 269 matching lines @@
 
   return s.Run();
 }
 
 bool LoginDatabase::UpdateLogin(const PasswordForm& form, int* items_changed) {
   std::string encrypted_password;
   if (EncryptedString(form.password_value, &encrypted_password) !=
           ENCRYPTION_RESULT_SUCCESS)
     return false;
 
+  // Replacement is necessary to deal with updating imported credentials. See
+  // crbug.com/349138 for details.
   sql::Statement s(db_.GetCachedStatement(SQL_FROM_HERE,
-      "UPDATE logins SET "
+      "UPDATE OR REPLACE logins SET "
       "action_url = ?, "
       "password_value = ?, "
       "ssl_valid = ?, "
       "preferred = ?, "
       "possible_usernames = ?, "
       "times_used = ?, "
       "username_element = ?, "
       "password_element = ?, "
       "submit_element = ? "
       "WHERE origin_url = ? AND "
@@ skipping 290 matching lines @@
     const Pickle& p) const {
   std::vector<base::string16> ret;
   base::string16 str;
 
   PickleIterator iterator(p);
   while (iterator.ReadString16(&str)) {
     ret.push_back(str);
   }
   return ret;
 }