Modifies the threshold for hidpi displays.

chrome/browser/resources/options/chromeos/display_options.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 #display-options-page {
   background-color: rgb(240, 240, 240);
+  min-width: 450px;
 }
 
 #display-options-content-area {
   padding: 0;
 }
 
 #display-options-displays-view-host {
   padding: 20px 0 20px 0;
 }
 
@@ skipping 68 matching lines @@
 .displays-focused {
   border: solid 2px rgb(0, 138, 255);
   color: rgb(0, 138, 255);
 }
 
 #display-options-toggle-mirroring {
   margin-right: 5px;
 }
 
 .display-options-button {
-  width: 130px;
+  width: 155px;
 }