[MD History] Add history-list-container between app and history lists.

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

Index: chrome/test/data/webui/md_history/history_item_test.js
diff --git a/chrome/test/data/webui/md_history/history_item_test.js b/chrome/test/data/webui/md_history/history_item_test.js
index 77700e3cb3ca3809dded16d970ad1fa47a02b1df..600f156c3d6daf7fbaa6e8561d2c0c8039d4c3dd 100644
--- a/chrome/test/data/webui/md_history/history_item_test.js
+++ b/chrome/test/data/webui/md_history/history_item_test.js
@@ -10,7 +10,7 @@ cr.define('md_history.history_item_test', function() {
       var SEARCH_HISTORY_RESULTS;
 
       suiteSetup(function() {
-        element = $('history-app').$['history-list'];
+        element = $('history-app').$['history'].$['history-list'];
         TEST_HISTORY_RESULTS = [
           createHistoryEntry('2016-03-16 10:00', 'http://www.google.com'),
           createHistoryEntry('2016-03-16 9:00', 'http://www.example.com'),