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

chrome/browser/password_manager/native_backend_gnome_x_unittest.cc

 // Copyright (c) 2012 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 <map>
 #include <utility>
@@ skipping 473 matching lines @@
     CheckUint32Attribute(item, "preferred", form.preferred);
     // 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(
         item->attributes.at("form_data").value_string, &actual);
     EXPECT_TRUE(form.form_data.SameFormAs(actual));
   }
 
@@ skipping 774 matching lines @@
       base::Bind(&CheckTrue));
 
   RunBothThreads();
 
   EXPECT_EQ(2u, form_list.size());
   EXPECT_THAT(form_list, UnorderedElementsAre(Pointee(form_google_),
                                               Pointee(form_facebook_)));
 }
 
 // TODO(mdm): add more basic tests here at some point.