Profile chooser on mac was passing wrong value to signin error controller.

components/signin/core/browser/about_signin_internals.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 "components/signin/core/browser/about_signin_internals.h"
 
 #include "base/command_line.h"
 #include "base/hash.h"
 #include "base/i18n/time_formatting.h"
 #include "base/logging.h"
@@ skipping 528 matching lines @@
                     account_id);
     AddSectionEntry(basic_info,
                     SigninStatusFieldToLabel(
                         static_cast<UntimedSigninStatusField>(GAIA_ID)),
                     account_tracker->GetAccountInfo(account_id).gaia);
     AddSectionEntry(basic_info,
                     SigninStatusFieldToLabel(
                         static_cast<UntimedSigninStatusField>(USERNAME)),
                     signin_manager->GetAuthenticatedUsername());
     if (signin_error_controller->HasError()) {
+      std::string error_account_id =

[Mike Lerman, 2015/04/24 19:36:26]

nit: Can this and just below be const std::string&?

[Roger Tawa OOO till Jul 10th, 2015/04/27 20:31:59]

Done.

+          signin_error_controller->error_account_id();
+      std::string error_username =
+          account_tracker->GetAccountInfo(error_account_id).email;
       AddSectionEntry(basic_info, "Auth Error",
           signin_error_controller->auth_error().ToString());
-      AddSectionEntry(basic_info, "Auth Error Username",
-          signin_error_controller->error_username());
+      AddSectionEntry(basic_info, "Auth Error Account Id", error_account_id);
+      AddSectionEntry(basic_info, "Auth Error Username", error_username);
     } else {
       AddSectionEntry(basic_info, "Auth Error", "None");
     }
   }
 
 #if !defined(OS_CHROMEOS)
   // TODO(robliao): Remove ScopedTracker below once https://crbug.com/422460 is
   // fixed.
   tracked_objects::ScopedTracker tracking_profile3(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
@@ skipping 66 matching lines @@
   }
 
   for(const std::string& account_id : accounts_in_token_service) {
     base::DictionaryValue* entry = new base::DictionaryValue();
     entry->SetString("accountId", account_id);
     account_info->Append(entry);
   }
 
   return signin_status.Pass();
 }