Prevent bogus 'search-changed' event firing from cr_search_field_behavior.js.

chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js

Index: chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js
diff --git a/chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js b/chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js
index 85ba39401be603932f8d5348c952885d27a37692..48107ee2a51565afec2e32c5afdcafdfae1d31c2 100644
--- a/chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js
+++ b/chrome/test/data/webui/cr_elements/cr_toolbar_search_field_tests.js
@@ -34,6 +34,23 @@ cr.define('cr_toolbar_search_field', function() {
         searches = null;
       });
 
+      // Test that no initial 'search-changed' event is fired during
+      // construction and initialization of the cr-toolbar-search-field element.
+      test('no initial search-changed event', function() {
+        var didFire = false;
+        var onSearchChanged = function () { didFire = true; };
+
+        // Need to attach listener event before the element is created, to catch
+        // the unnecessary initial event.
+        document.body.addEventListener('search-changed', onSearchChanged);
+        document.body.innerHTML =
+            '<cr-toolbar-search-field></cr-toolbar-search-field>';
+        // Remove event listener on |body| so that other tests are not affected.
+        document.body.removeEventListener('search-changed', onSearchChanged);
+
+        assertFalse(didFire, 'Should not have fired search-changed event');
+      });
+
       test('opens and closes correctly', function() {
         assertFalse(field.showingSearch);
         MockInteractions.tap(field);