Add error handling to inline signin flow

chrome/browser/ui/sync/one_click_signin_helper.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/browser/ui/sync/one_click_signin_helper.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 #include <vector>
@@ skipping 1010 matching lines @@
 // static
 void OneClickSigninHelper::RemoveSigninRedirectURLHistoryItem(
     content::WebContents* web_contents) {
   // Only actually remove the item if it's the blank.html continue url.
   if (signin::IsContinueUrlForWebBasedSigninFlow(
           web_contents->GetLastCommittedURL())) {
     new CurrentHistoryCleaner(web_contents);  // will self-destruct when done
   }
 }
 
+// static
 void OneClickSigninHelper::ShowSigninErrorBubble(Browser* browser,
                                                  const std::string& error) {
   DCHECK(!error.empty());
 
   browser->window()->ShowOneClickSigninBubble(
       BrowserWindow::ONE_CLICK_SIGNIN_BUBBLE_TYPE_BUBBLE,
       string16(), /* no SAML email */
       UTF8ToUTF16(error),
       // This callback is never invoked.
       // TODO(rogerta): Separate out the bubble API so we don't have to pass
@@ skipping 438 matching lines @@
     // If the web contents is showing a blank page and not about to be closed,
     // redirect to the NTP or apps page.
     if (signin::IsContinueUrlForWebBasedSigninFlow(current_url) &&
         !signin::IsAutoCloseEnabledInURL(original_continue_url_)) {
       RedirectToNtpOrAppsPage(
           web_contents(),
           signin::GetSourceForPromoURL(original_continue_url_));
     }
   }
 }