--- a/chrome/browser/ui/chrome_pages.cc	2018-04-28 19:51:03.401485817 
-0400
+++ b/chrome/browser/ui/chrome_pages.cc.new	2018-04-28 
19:59:09.964119903 -0400
@@ -72,12 +72,6 @@
   ShowSingletonTabOverwritingNTP(browser, std::move(params));
 }
 
-void NavigateToSingletonTab(Browser* browser, const GURL& url) {
-  NavigateParams params(GetSingletonTabNavigateParams(browser, url));
-  params.path_behavior = NavigateParams::IGNORE_AND_NAVIGATE;
-  ShowSingletonTabOverwritingNTP(browser, std::move(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
@@ -384,6 +378,7 @@
 #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);
@@ -418,17 +418,8 @@
             access_point, signin_metrics::Reason::REASON_SIGNIN_PRIMARY_ACCOUNT,
             false));
     DCHECK_GT(browser->tab_strip_model()->count(), 0);
-  } else {
-#if defined(OS_CHROMEOS)
-    NOTREACHED();
-#else
-    profiles::BubbleViewMode bubble_view_mode =
-        manager->IsAuthenticated() ? profiles::BUBBLE_VIEW_MODE_GAIA_REAUTH
-                                   : profiles::BUBBLE_VIEW_MODE_GAIA_SIGNIN;
-    browser->signin_view_controller()->ShowSignin(bubble_view_mode, browser,
-                                                  access_point);
-#endif
   }
+   #endif
 }
 
 void ShowBrowserSigninOrSettings(Browser* browser,