cros: Enable views login

If there is a crash session manager will revert to webui. If there is a feature
missing the user can click a button on the shelf which will revert to webui.

Bug: 784495
Change-Id: I218b5a217941dfde51d1a78080ef4d9e30ca87d2
Reviewed-on: https://chromium-review.googlesource.com/972328
Commit-Queue: Jacob Dufault <jdufault@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552075}

ash/public/cpp/ash_switches.cc

@@ -169,10 +169,9 @@ bool IsSidebarEnabled() {
 }
 
 bool IsUsingViewsLogin() {
-  // Only show views login if it is forced. If both switches are present use
-  // webui.
-  base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
-  return !cl->HasSwitch(kShowWebUiLogin) && cl->HasSwitch(kShowViewsLogin);
+  // Only show webui login if it is forced. If both switches are present use
+  // views.
+  return !base::CommandLine::ForCurrentProcess()->HasSwitch(kShowWebUiLogin);
 }
 
 bool IsUsingViewsLock() {