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

chrome/browser/first_run/first_run.cc

Index: chrome/browser/first_run/first_run.cc
diff --git a/chrome/browser/first_run/first_run.cc b/chrome/browser/first_run/first_run.cc
index f1737c18131025190b51ca0ce8c34f2654e23a1d..29fcd2cfeba741f923e12c169885e75c2d11aa00 100644
--- a/chrome/browser/first_run/first_run.cc
+++ b/chrome/browser/first_run/first_run.cc
@@ -33,6 +33,7 @@
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/global_error/global_error_service.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
+#include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
@@ -532,8 +533,7 @@ void FirstRunBubbleLauncher::Observe(
   content::WebContents* contents = chrome::GetActiveWebContents(browser);
 
   // Suppress the first run bubble if a Gaia sign in page is showing.
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseWebBasedSigninFlow) &&
+  if (OneClickSigninHelper::UseWebBasedSigninFlow() &&
       gaia::IsGaiaSignonRealm(contents->GetURL().GetOrigin())) {
       return;
   }