[MD History] Disable Clear Browsing Data button for supervised users.

chrome/browser/resources/md_history/side_bar.html

Index: chrome/browser/resources/md_history/side_bar.html
diff --git a/chrome/browser/resources/md_history/side_bar.html b/chrome/browser/resources/md_history/side_bar.html
index 373009e25cd1ba851ffb44fdbd04eb980b37c34f..a22cc375c9c502a5140635c240d9ba66f82edb82 100644
--- a/chrome/browser/resources/md_history/side_bar.html
+++ b/chrome/browser/resources/md_history/side_bar.html
@@ -25,6 +25,11 @@
         margin: 8px 0;
       }
 
+      a[disabled] {
+        color: var(--paper-grey-400);
+        pointer-events: none;
+      }
+
       #clear-browsing-data {
         justify-content: space-between;
       }
@@ -104,7 +109,8 @@
       </a>
       <div class="separator"></div>
       <a href="chrome://settings/clearBrowserData"
-          on-tap="onClearBrowsingDataTap_" id="clear-browsing-data">
+          on-tap="onClearBrowsingDataTap_" id="clear-browsing-data"
+          disabled$="[[!deletingAllowed_()]]">
         $i18n{clearBrowsingData}
         <iron-icon icon="cr:open-in-new"></iron-icon>
         <paper-ripple id="cbd-ripple"></paper-ripple>