OneClickSigninHelper::CanOffer checks IsEnableWebBasedSignin

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 666 matching lines @@
                                     std::string* error_message) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
     VLOG(1) << "OneClickSigninHelper::CanOffer";
 
   if (error_message)
     error_message->clear();
 
   if (!web_contents)
     return false;
 
+  if (!switches::IsEnableWebBasedSignin())
+    return false;
+
   if (web_contents->GetBrowserContext()->IsOffTheRecord())
     return false;
 
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   if (!profile)
     return false;
 
   SigninManager* manager =
       SigninManagerFactory::GetForProfile(profile);
@@ skipping 824 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_));
     }
   }
 }