# Disables browser sign-in

--- a/components/signin/core/browser/signin_manager_base.cc
+++ b/components/signin/core/browser/signin_manager_base.cc
@@ -159,7 +159,7 @@
 bool SigninManagerBase::IsInitialized() const { return initialized_; }
 
 bool SigninManagerBase::IsSigninAllowed() const {
-  return client_->GetPrefs()->GetBoolean(prefs::kSigninAllowed);
+  return false;
 }
 
 AccountInfo SigninManagerBase::GetAuthenticatedAccountInfo() const {
--- a/chrome/browser/ui/chrome_pages.cc
+++ b/chrome/browser/ui/chrome_pages.cc
@@ -76,12 +76,6 @@
   ShowSingletonTabOverwritingNTP(browser, params);
 }
 
-void NavigateToSingletonTab(Browser* browser, const GURL& url) {
-  NavigateParams params(GetSingletonTabNavigateParams(browser, url));
-  params.path_behavior = NavigateParams::IGNORE_AND_NAVIGATE;
-  ShowSingletonTabOverwritingNTP(browser, params);
-}
-
 // Shows either the help app or the appropriate help page for |source|. If
 // |browser| is NULL and the help page is used (vs the app), the help page is
 // shown in the last active browser. If there is no such browser, a new browser
@@ -391,6 +385,7 @@
 #if !defined(OS_ANDROID)
 void ShowBrowserSignin(Browser* browser,
                        signin_metrics::AccessPoint access_point) {
+#if 0
   Profile* original_profile = browser->profile()->GetOriginalProfile();
   SigninManagerBase* manager =
       SigninManagerFactory::GetForProfile(original_profile);
@@ -430,6 +425,7 @@
             access_point, signin_metrics::Reason::REASON_SIGNIN_PRIMARY_ACCOUNT,
             false));
     DCHECK_GT(browser->tab_strip_model()->count(), 0);
+#endif
   }
 }