MD History: Add icon in top right of page when showing synced results

chrome/browser/resources/md_history/history.js

Index: chrome/browser/resources/md_history/history.js
diff --git a/chrome/browser/resources/md_history/history.js b/chrome/browser/resources/md_history/history.js
index d25e8e92e1a2bba7eb5a35d545fdfa19c97e8ce8..522e8f9b32adc214841785c03666f0e42515827b 100644
--- a/chrome/browser/resources/md_history/history.js
+++ b/chrome/browser/resources/md_history/history.js
@@ -58,14 +58,10 @@ function historyResult(info, results) {
  */
 function showNotification(
     hasSyncedResults, includeOtherFormsOfBrowsingHistory) {
-  // TODO(msramek): |hasSyncedResults| was used in the old WebUI to show
-  // the message about other signed-in devices. This message does not exist
-  // in the MD history anymore, so the parameter is not needed. Remove it
-  // when WebUI is removed and this becomes the only client of
-  // BrowsingHistoryHandler.
   waitForAppUpgrade().then(function() {
-    /** @type {HistoryAppElement} */ ($('history-app')).showSidebarFooter =
-        includeOtherFormsOfBrowsingHistory;
+    var app = /** @type {HistoryAppElement} */ ($('history-app'));
+    app.showSidebarFooter = includeOtherFormsOfBrowsingHistory;
+    app.hasSyncedResults = hasSyncedResults;
   });
 }