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

chrome/browser/resources/md_history/list_container.js

Index: chrome/browser/resources/md_history/list_container.js
diff --git a/chrome/browser/resources/md_history/list_container.js b/chrome/browser/resources/md_history/list_container.js
index 772a9a62ea0ad6aef9992e2ef86f9921f10f1e3d..2999a2ecd23bb99695e3c579d023b6f4d08bdff1 100644
--- a/chrome/browser/resources/md_history/list_container.js
+++ b/chrome/browser/resources/md_history/list_container.js
@@ -6,6 +6,11 @@ Polymer({
   is: 'history-list-container',
 
   properties: {
+    canDeleteHistory_: {
+      type: Boolean,
+      value: loadTimeData.getBoolean('allowDeletingHistory'),
+    },
+
     /** @type {!QueryState} */
     queryState: Object,
 
@@ -210,9 +215,4 @@ Polymer({
   getSelectedList_: function() {
     return this.$['infinite-list'];
   },
-
-  /** @private */
-  canDeleteHistory_: function() {
-    return loadTimeData.getBoolean('allowDeletingHistory');
-  }
 });