MD WebUI: Add shared cr-toolbar element

chrome/test/data/webui/md_history/history_toolbar_test.js

Index: chrome/test/data/webui/md_history/history_toolbar_test.js
diff --git a/chrome/test/data/webui/md_history/history_toolbar_test.js b/chrome/test/data/webui/md_history/history_toolbar_test.js
index 56148125a3b96c7ac01f6c438ddae5ef819f5579..166a56f1a063563f29d57bdddd816b14e9e01e30 100644
--- a/chrome/test/data/webui/md_history/history_toolbar_test.js
+++ b/chrome/test/data/webui/md_history/history_toolbar_test.js
@@ -55,8 +55,9 @@ cr.define('md_history.history_toolbar_test', function() {
         registerMessageCallback('queryHistory', this, function (info) {
           assertEquals('example.com', info[0]);
           flush(function() {
-            assertEquals(toolbar.$$('#search-input').$$('#search-input').value,
-                'example.com');
+            assertEquals(
+                'example.com',
+                toolbar.$['main-toolbar'].getSearchField().getValue());
             done();
           });
         });