MD Extensions: Show messages for no extensions, and for no search results

chrome/test/data/webui/extensions/extension_manager_test.js

Index: chrome/test/data/webui/extensions/extension_manager_test.js
diff --git a/chrome/test/data/webui/extensions/extension_manager_test.js b/chrome/test/data/webui/extensions/extension_manager_test.js
index 4c3f760ce1a3d522f75aa900eb3ff8cfc1023bd6..14e45305ea5b92187ff732c23fea801c860e39b2 100644
--- a/chrome/test/data/webui/extensions/extension_manager_test.js
+++ b/chrome/test/data/webui/extensions/extension_manager_test.js
@@ -78,7 +78,6 @@ cr.define('extension_manager_tests', function() {
       });
 
       test(assert(TestNames.ItemListVisibility), function() {
-        var testVisible = extension_test_util.testVisible.bind(null, manager);
         var extension = getDataByName(manager.extensions, 'My extension 1');
 
         var listHasItemWithName = function(name) {
@@ -88,17 +87,14 @@ cr.define('extension_manager_tests', function() {
         };
 
         expectEquals(manager.extensions, manager.$['items-list'].items);
-        testVisible('#items-list', true);
         expectTrue(listHasItemWithName('My extension 1'));
 
         manager.removeItem(extension);
         Polymer.dom.flush();
-        testVisible('#items-list', false);
         expectFalse(listHasItemWithName('My extension 1'));
 
         manager.addItem(extension);
         Polymer.dom.flush();
-        testVisible('#items-list', true);
         expectTrue(listHasItemWithName('My extension 1'));
       });