MD Settings: Allow search within settings to track multiple requests separately.

chrome/test/data/webui/settings/basic_page_browsertest.js

Index: chrome/test/data/webui/settings/basic_page_browsertest.js
diff --git a/chrome/test/data/webui/settings/basic_page_browsertest.js b/chrome/test/data/webui/settings/basic_page_browsertest.js
index 9a290f70ce12da59151a7a3575aa40fc25eeb0d4..c0a186f0822caff15d5f540f23874267b8ae5a33 100644
--- a/chrome/test/data/webui/settings/basic_page_browsertest.js
+++ b/chrome/test/data/webui/settings/basic_page_browsertest.js
@@ -56,7 +56,8 @@ TEST_F('SettingsBasicPageBrowserTest', 'MAYBE_Load', function() {
     /** @override */
     search: function(text, page) {
       if (this.searchRequest_ == null || !this.searchRequest_.isSame(text)) {
-        this.searchRequest_ = new settings.SearchRequest(text);
+        this.searchRequest_ = new settings.SearchRequest(
+            text, document.createElement('div'));
         this.searchRequest_.finished = true;
         this.searchRequest_.updateMatches(false);