MD Settings: hide browsing history-related rows for supervised users

chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html

Index: chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
diff --git a/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html b/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
index f26511369b45d4d88f7876f3c062b5b01a6918ab..780f0dadc9e115d5596f66cd33105a86a3c3cebc 100644
--- a/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
+++ b/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
@@ -111,17 +111,23 @@
               menu-options="[[clearFromOptions_]]">
           </settings-dropdown-menu>
         </div>
+        <!-- Note: whether these checkboxes are checked are ignored if deleting
+             history is disabled (i.e. supervised users, policy), so it's OK to
+             have a hidden checkbox that's also checked (as the C++ accounts for
+             whether a user is allowed to delete history independently). -->
         <settings-checkbox id="browsingCheckbox"
             pref="{{prefs.browser.clear_data.browsing_history}}"
             label="$i18n{clearBrowsingHistory}"
             sub-label="[[counters_.browsing_history]]"
-            disabled="[[clearingInProgress_]]">
+            disabled="[[clearingInProgress_]]"
+            hidden="[[isSupervised_]]">
         </settings-checkbox>
         <settings-checkbox id="downloadCheckbox"
             pref="{{prefs.browser.clear_data.download_history}}"
             label="$i18n{clearDownloadHistory}"
             sub-label="[[counters_.download_history]]"
-            disabled="[[clearingInProgress_]]">
+            disabled="[[clearingInProgress_]]"
+            hidden="[[isSupervised_]]">
         </settings-checkbox>
         <settings-checkbox
             pref="{{prefs.browser.clear_data.cache}}"