Extensions page: Fix RuntimeHost tests to work with Polymer 2

Bug: 875449
Change-Id: Ic4c32e2d8c2385dafb778a517d5622d58e090bd7
Reviewed-on: https://chromium-review.googlesource.com/1197264Reviewed-by: Scott Chen <scottchen@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587896}

chrome/browser/resources/md_extensions/runtime_hosts_dialog.js

@@ -76,7 +76,7 @@ cr.define('extensions', function() {
 
     /** @override */
     attached: function() {
-      if (this.currentSite !== null) {
+      if (this.currentSite !== null && this.currentSite !== undefined) {
         this.site_ = this.currentSite;
         this.validate_();
       }
@@ -114,7 +114,8 @@ cr.define('extensions', function() {
      * @private
      */
     computeSubmitButtonDisabled_: function() {
-      return this.inputInvalid_ || this.site_.trim().length == 0;
+      return this.inputInvalid_ || this.site_ === undefined ||
+          this.site_.trim().length == 0;
     },
 
     /**

testing/buildbot/filters/webui_polymer2_browser_tests.filter

@@ -15,8 +15,6 @@
 # --gtest_repeat=5, but might pass on a single invocation).
 
 # Chrome Desktop failures (Mac, Linux, Windows).
--CrExtensionsRuntimeHostPermissionsTest.All
--CrExtensionsRuntimeHostsDialogTest.All
 -CrSettingsAllSitesTest.All
 -CrSettingsLanguagesPageTest.InputMethods
 -CrSettingsMainPageTest.MainPage
@@ -166,6 +164,8 @@ CrExtensionsManagerUnitTest.*
 CrExtensionsNavigationHelperTest.*
 CrExtensionsOptionsDialogTest.*
 CrExtensionsPackDialogTest.*
+CrExtensionsRuntimeHostPermissionsTest.*
+CrExtensionsRuntimeHostsDialogTest.*
 CrExtensionsShortcutInputTest.*
 CrExtensionsShortcutTest.*
 CrExtensionsSidebarTest.*