Exclude building signin view controller and its delegate on ChromeOS

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 3cad7e628f94076dd14d13101123af31b77a0b86..aa2dbe2a97da0ceac29c18980252b20557f46e11 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -929,23 +929,6 @@ void Browser::UpdateUIForNavigationInTab(
   }
 }
 
-void Browser::ShowModalSigninWindow(profiles::BubbleViewMode mode,
-                                    signin_metrics::AccessPoint access_point) {
-  signin_view_controller_.ShowModalSignin(mode, this, access_point);
-}
-
-void Browser::CloseModalSigninWindow() {
-  signin_view_controller_.CloseModalSignin();
-}
-
-void Browser::ShowModalSyncConfirmationWindow() {
-  signin_view_controller_.ShowModalSyncConfirmationDialog(this);
-}
-
-void Browser::ShowModalSigninErrorWindow() {
-  signin_view_controller_.ShowModalSigninErrorDialog(this);
-}
-
 void Browser::RegisterKeepAlive() {
   keep_alive_.reset(new ScopedKeepAlive(KeepAliveOrigin::BROWSER,
                                         KeepAliveRestartOption::DISABLED));