Disable VK overscroll for login/out-of-box.

chrome/browser/chromeos/login/helper.cc

Index: chrome/browser/chromeos/login/helper.cc
diff --git a/chrome/browser/chromeos/login/helper.cc b/chrome/browser/chromeos/login/helper.cc
index fc68d9fb3ffe284de73a4a773e5417d901baabe3..5d706fe3058580c53930e594bcec07ea99184d5c 100644
--- a/chrome/browser/chromeos/login/helper.cc
+++ b/chrome/browser/chromeos/login/helper.cc
@@ -5,8 +5,10 @@
 #include "chrome/browser/chromeos/login/helper.h"
 
 #include "ash/shell.h"
+#include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chromeos/login/users/user_manager.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/network/network_handler.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
@@ -50,6 +52,11 @@ std::string CanonicalizeUserID(const std::string& user_id) {
   return gaia::CanonicalizeEmail(user_id);
 }
 
+bool LoginScrollIntoViewEnabled() {
+  return !CommandLine::ForCurrentProcess()->HasSwitch(
+      chromeos::switches::kDisableLoginScrollIntoView);
+}
+
 NetworkStateHelper::NetworkStateHelper() {}
 NetworkStateHelper::~NetworkStateHelper() {}