MD Settings: Display: Disable orientaiton control in tablet mode

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

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-tabs/paper-tabs.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="display_layout.html">
 <link rel="import" href="display_overscan_dialog.html">
@@ skipping 136 matching lines @@
         </settings-slider>
       </div>
 
       <template is="dom-if" if="[[!unifiedDesktopMode_]]" restamp>
         <div class="settings-box embedded">
           <div id="displayOrientation" class="start textarea">
             $i18n{displayOrientation}
           </div>
           <div class="md-select-wrapper">
             <select class="md-select" value="[[selectedDisplay.rotation]]"
+                disabled="[[!enableOrientation_(selectedDisplay)]]"
                 aria-labelledby="displayOrientation"
                 on-change="onOrientationChange_">
               <option value="0">$i18n{displayOrientationStandard}</option>
               <option value="90">90</option>
               <option value="180">180</option>
               <option value="270">270</option>
             </select>
             <span class="md-select-underline"></span>
           </div>
         </div>
@@ skipping 29 matching lines @@
           </div>
         </div>
         <button class="subpage-arrow" is="paper-icon-button-light"
             aria-label="$i18n{displayTouchCalibrationTitle}"
             aria-describedby="touchCalibrationSecondary"></button>
       </div>
     </div>
   </template>
   <script src="display.js"></script>
 </dom-module>