Use same vk non-overscroll solution for both login and lock screens

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 173747665eff1f1fefaf3e19d8a87686ec3e043a..a0a0d067e4b9d6b4ec511e3b7ee7895edbf8be6f 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -36,14 +36,10 @@ const char kDisableDemoMode[] = "disable-demo-mode";
 // Disable Genius App and use the original Help App instead.
 const char kDisableGeniusApp[] = "disable-genius-app";
 
-// Disable lock UI (user pods) scrolling into view with CSS change when virtual
-// keyboard is shown.
-const char kDisableLockScrollIntoView[]    = "disable-lock-scroll-into-view";
-
 // Avoid doing expensive animations upon login.
 const char kDisableLoginAnimations[] = "disable-login-animations";
 
-// Disable login UI (user pods) scrolling into view on JS side when virtual
+// Disable login/lock UI (user pods) scrolling into view on JS side when virtual
 // keyboard is shown.
 const char kDisableLoginScrollIntoView[]    = "disable-login-scroll-into-view";