Bookmarks WebUI: announce when search is cleared

Bug: 854673
Change-Id: I139764a243ebf1d6c4209e124e6a8cf328985053
Reviewed-on: https://chromium-review.googlesource.com/c/1299835Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607808}

chrome/app/generated_resources.grd

@@ -332,6 +332,9 @@ are declared in tools/grit/grit_rule.gni.
       </message>
       <!-- Search strings are only used in webui, so no mobile. -->
       <if expr="not is_android">
+        <message name="IDS_SEARCH_CLEARED" desc="Message announced to screenreader users when search is cleared.">
+          Search cleared
+        </message>
         <message name="IDS_SEARCH_RESULTS" desc="Message announced to screenreader users when searching completes and results are showing.">
           Search results for '<ph name="SEARCH_TEXT">$1<ex>cookies</ex></ph>'
         </message>

chrome/browser/resources/md_bookmarks/app.js

@@ -115,7 +115,12 @@ Polymer({
   },
 
   /** @private */
-  searchTermChanged_: function() {
+  searchTermChanged_: function(newValue, oldValue) {
+    if (oldValue != undefined && !newValue) {
+      this.fire(
+          'iron-announce', {text: loadTimeData.getString('searchCleared')});
+    }
+
     if (!this.searchTerm_)
       return;
 

chrome/browser/ui/webui/md_bookmarks/md_bookmarks_ui.cc

@@ -127,6 +127,7 @@ content::WebUIDataSource* CreateMdBookmarksUIHTMLSource(Profile* profile) {
                      IDS_MD_BOOKMARK_MANAGER_SIDEBAR_NODE_COLLAPSE_AX_LABEL);
   AddLocalizedString(source, "sidebarNodeExpandAxLabel",
                      IDS_MD_BOOKMARK_MANAGER_SIDEBAR_NODE_EXPAND_AX_LABEL);
+  AddLocalizedString(source, "searchCleared", IDS_SEARCH_CLEARED);
   AddLocalizedString(source, "searchResults", IDS_SEARCH_RESULTS);
   AddLocalizedString(source, "saveEdit", IDS_SAVE);
   AddLocalizedString(source, "title", IDS_MD_BOOKMARK_MANAGER_TITLE);