Enable web-based sign in flow by default. Can use command line argument

chrome/browser/ui/startup/startup_browser_creator_impl.cc

Index: chrome/browser/ui/startup/startup_browser_creator_impl.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator_impl.cc b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
index 14e97210c87e76d776ddd15a248ba68812da5600..54c64ca6fef997d4e387a2c715edb422eddcc682 100644
--- a/chrome/browser/ui/startup/startup_browser_creator_impl.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
@@ -65,6 +65,7 @@
 #include "chrome/browser/ui/startup/obsolete_os_prompt.h"
 #include "chrome/browser/ui/startup/session_crashed_prompt.h"
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
+#include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/tabs/pinned_tab_codec.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ -965,8 +966,7 @@ void StartupBrowserCreatorImpl::AddStartupURLs(
   // of the list.
   if (SyncPromoUI::ShouldShowSyncPromoAtStartup(profile_, is_first_run_)) {
     GURL continue_url;
-    if (!CommandLine::ForCurrentProcess()->HasSwitch(
-            switches::kUseWebBasedSigninFlow)) {
+    if (!OneClickSigninHelper::UseWebBasedSigninFlow()) {
       continue_url = GURL(chrome::kChromeUINewTabURL);
     }