MD Bookmarks: Scroll and select items that are added to the main list

chrome/test/data/webui/md_bookmarks/list_test.js

Index: chrome/test/data/webui/md_bookmarks/list_test.js
diff --git a/chrome/test/data/webui/md_bookmarks/list_test.js b/chrome/test/data/webui/md_bookmarks/list_test.js
index 755e1b624c40a9a867b865381fbe7d2465088703..1fb3993a0c515f427b31ed29cbae0d725896871a 100644
--- a/chrome/test/data/webui/md_bookmarks/list_test.js
+++ b/chrome/test/data/webui/md_bookmarks/list_test.js
@@ -70,6 +70,13 @@ suite('<bookmarks-list>', function() {
     list.displayedIds_ = ['1', '3', '7', '5'];
     assertDeepEquals(list.displayedIds_, list.displayedList_.map(n => n.id));
   });
+
+  test('selects all valid IDs on highlight-items', function() {
+    list.fire('highlight-items', ['10', '1', '3', '9']);
+    assertEquals('select-items', store.lastAction.name);
+    assertEquals('1', store.lastAction.anchor);
+    assertDeepEquals(['1', '3'], store.lastAction.items);
+  });
 });
 
 suite('<bookmarks-list> integration test', function() {