Make sure to display an errors that occur during the chrome sign in process

chrome/common/pref_names.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 "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 1709 matching lines @@
 
 // Boolean that specifies if the sync promo is allowed to show on first run.
 // This preference is specified in the master preference file to suppress the
 // sync promo for some installations.
 const char kSyncPromoShowOnFirstRunAllowed[] =
     "sync_promo.show_on_first_run_allowed";
 
 // Boolean that specifies if we should show a bubble in the new tab page.
 // The bubble is used to confirm that the user is signed into sync.
 const char kSyncPromoShowNTPBubble[] = "sync_promo.show_ntp_bubble";
+
+// An error to show in the sync promo bubble, if needed.  If the sign in was
+// successful, this property holds an empty string.
+const char kSyncPromoErrorMessage[] = "sync_promo.error_message";
 #endif
 
 // Time when the user's GAIA info was last updated (represented as an int64).
 const char kProfileGAIAInfoUpdateTime[] = "profile.gaia_info_update_time";
 
 // The URL from which the GAIA profile picture was downloaded. This is cached to
 // prevent the same picture from being downloaded multiple times.
 const char kProfileGAIAInfoPictureURL[] = "profile.gaia_info_picture_url";
 
 // Create web application shortcut dialog preferences.
@@ skipping 416 matching lines @@
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
 // 64-bit serialization of the time last policy usage statistics were collected
 // by UMA_HISTOGRAM_ENUMERATION.
 const char kLastPolicyStatisticsUpdate[] = "policy.last_statistics_update";
 
 }  // namespace prefs