MD Settings: Display: Disable orientaiton control in tablet mode

chrome/browser/resources/settings/device_page/display.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview
  * 'settings-display' is the settings subpage for display settings.
  */
 
 cr.define('settings.display', function() {
@@ skipping 332 matching lines @@
     var widthStr = mode.width.toString();
     var heightStr = mode.height.toString();
     if (best)
       return this.i18n('displayResolutionTextBest', widthStr, heightStr);
     else if (mode.isNative)
       return this.i18n('displayResolutionTextNative', widthStr, heightStr);
     return this.i18n('displayResolutionText', widthStr, heightStr);
   },
 
   /**
+   * @param {!chrome.system.display.DisplayUnitInfo} selectedDisplay
+   * @return {boolean}
+   * @private
+   */
+  enableOrientation_: function(selectedDisplay) {
+    return !selectedDisplay.isMaximizeMode;
+  },
+
+  /**
    * @param {!{detail: string}} e |e.detail| is the id of the selected display.
    * @private
    */
   onSelectDisplay_: function(e) {
     var id = e.detail;
     for (var i = 0; i < this.displays.length; ++i) {
       var display = this.displays[i];
       if (id == display.id) {
         if (this.selectedDisplay != display)
           this.setSelectedDisplay_(display);
@@ skipping 153 matching lines @@
   },
 
   /** @private */
   setPropertiesCallback_: function() {
     if (chrome.runtime.lastError) {
       console.error(
           'setDisplayProperties Error: ' + chrome.runtime.lastError.message);
     }
   },
 });