Revert of Follow up change for disabling out-of-box VK overscroll

chrome/browser/chromeos/login/ui/webui_login_display.cc

Index: chrome/browser/chromeos/login/ui/webui_login_display.cc
diff --git a/chrome/browser/chromeos/login/ui/webui_login_display.cc b/chrome/browser/chromeos/login/ui/webui_login_display.cc
index e6bcdd8508e10567ab605a85a44238e8c007bcd6..4a3f7b33bc3a868feef77f9b108e9703346a4e9b 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_display.cc
+++ b/chrome/browser/chromeos/login/ui/webui_login_display.cc
@@ -206,6 +206,21 @@
     webui_handler_->ShowSigninUI(email);
 }
 
+void WebUILoginDisplay::ShowControlBar(bool show) {
+  if (webui_handler_)
+    webui_handler_->ShowControlBar(show);
+}
+
+void WebUILoginDisplay::SetKeyboardState(bool shown) {
+  if (webui_handler_)
+    webui_handler_->SetKeyboardState(shown);
+}
+
+void WebUILoginDisplay::SetClientAreaSize(int width, int height) {
+  if (webui_handler_)
+    webui_handler_->SetClientAreaSize(width, height);
+}
+
 // WebUILoginDisplay, NativeWindowDelegate implementation: ---------------------
 gfx::NativeWindow WebUILoginDisplay::GetNativeWindow() const {
   return parent_window();