MD History: Announce search results for screen-reader 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 dd7c29c11ae7adbbdc8ad1d23af3d3f3aa57d703..a0b7efeb8161e0eb0c198534a84da4dc04898525 100644
--- a/chrome/browser/resources/md_history/list_container.js
+++ b/chrome/browser/resources/md_history/list_container.js
@@ -41,6 +41,11 @@ Polymer({
     this.initializeResults_(info, results);
     this.closeMenu_();
 
+    if (info.term && !this.queryState.incremental) {
+      announceAccessibleMessage(
+          md_history.HistoryItem.searchResultsTitle(results.length, info.term));
+    }
+
     if (this.selectedPage_ == 'grouped-list') {
       this.$$('#grouped-list').historyData = results;
       return;