Nicely handle OnBeforeUnloads with guest and lock mode.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

Index: chrome/browser/ui/views/profiles/profile_chooser_view.cc
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.cc b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
index ebbf4e35bf0df6e812c83b6dbdc61af99aa9c6c7..c921a11fca5eabae1c7a3146a3a4c676a4fcb546 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.cc
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
@@ -706,13 +706,11 @@ void ProfileChooserView::ButtonPressed(views::Button* sender,
     sender->SetEnabled(false);
 
   if (sender == users_button_) {
-    // If this is a guest session, also close all the guest browser windows.
-    if (browser_->profile()->IsGuestSession()) {
-      chrome::ShowUserManager(base::FilePath());
+    // If this is a guest session, close all the guest browser windows.
+    if (browser_->profile()->IsGuestSession())
       profiles::CloseGuestProfileWindows();
-    } else {
+    else
       chrome::ShowUserManager(browser_->profile()->GetPath());
-    }
     PostActionPerformed(ProfileMetrics::PROFILE_DESKTOP_MENU_OPEN_USER_MANAGER);
   } else if (sender == go_incognito_button_) {
     DCHECK(ShouldShowGoIncognito());