CREDENTIAL: Serialize 'PasswordCredential' objects with "" as the federation.

chrome/browser/password_manager/native_backend_libsecret_unittest.cc

 // Copyright (c) 2015 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 <stdarg.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 380 matching lines @@
     // We don't check the date created. It varies.
     CheckUint32Attribute(item, "blacklisted_by_user", form.blacklisted_by_user);
     CheckUint32Attribute(item, "type", form.type);
     CheckUint32Attribute(item, "times_used", form.times_used);
     CheckUint32Attribute(item, "scheme", form.scheme);
     CheckStringAttribute(
         item, "date_synced",
         base::Int64ToString(form.date_synced.ToInternalValue()));
     CheckStringAttribute(item, "display_name", UTF16ToUTF8(form.display_name));
     CheckStringAttribute(item, "avatar_url", form.icon_url.spec());
+    // We serialize unique origins as "", in order to make other systems that
+    // read from the login database happy. https://crbug.com/591310
     CheckStringAttribute(item, "federation_url",
-                         form.federation_origin.Serialize());
+                         form.federation_origin.unique()
+                             ? ""
+                             : form.federation_origin.Serialize());
     CheckUint32Attribute(item, "should_skip_zero_click", form.skip_zero_click);
     CheckUint32Attribute(item, "generation_upload_status",
                          form.generation_upload_status);
     CheckStringAttribute(item, "application", app_string);
     autofill::FormData actual;
     DeserializeFormDataFromBase64String(
         static_cast<char*>(g_hash_table_lookup(item->attributes, "form_data")),
         &actual);
     EXPECT_TRUE(form.form_data.SameFormAs(actual));
   }
@@ skipping 545 matching lines @@
   EXPECT_EQ(form_google_, *form_list[0]);
 
   EXPECT_EQ(1u, global_mock_libsecret_items->size());
   if (!global_mock_libsecret_items->empty()) {
     CheckMockSecretItem((*global_mock_libsecret_items)[0], form_google_,
                         "chrome-42");
   }
 }
 
 // TODO(mdm): add more basic tests here at some point.