Open continue url from gaia incognito header

chrome/browser/signin/signin_header_helper.cc

Index: chrome/browser/signin/signin_header_helper.cc
diff --git a/chrome/browser/signin/signin_header_helper.cc b/chrome/browser/signin/signin_header_helper.cc
index 2e479e25a5056e12959da4cf4014d34cecd9aab2..5b2e73fc6995a580130e808056bc6b0bde053778 100644
--- a/chrome/browser/signin/signin_header_helper.cc
+++ b/chrome/browser/signin/signin_header_helper.cc
@@ -153,9 +153,12 @@ void ProcessMirrorHeaderUIThread(
   }
 #else  // defined(OS_ANDROID)
   if (service_type == signin::GAIA_SERVICE_TYPE_INCOGNITO) {
+    GURL url(manage_accounts_params.continue_url.empty() ?
+        chrome::kChromeUINativeNewTabURL :
+        manage_accounts_params.continue_url);
     web_contents->OpenURL(content::OpenURLParams(
-        GURL(chrome::kChromeUINativeNewTabURL), content::Referrer(),
-        OFF_THE_RECORD, ui::PAGE_TRANSITION_AUTO_TOPLEVEL, false));
+        url, content::Referrer(), OFF_THE_RECORD,
+        ui::PAGE_TRANSITION_AUTO_TOPLEVEL, false));
   } else {
     AccountManagementScreenHelper::OpenAccountManagementScreen(
         Profile::FromBrowserContext(web_contents->GetBrowserContext()),