MD Extensions: Fix assertion erroneously failing on blacklisted extensions.

This is causing the Extensions page to not display all extensions in such cases.

Bug: 823164
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I39ba59b9e1ccd71cca3b5c68fc9d3715949342ec
Reviewed-on: https://chromium-review.googlesource.com/981522
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546203}

chrome/browser/resources/md_extensions/item_util.js

@@ -24,6 +24,7 @@ cr.define('extensions', function() {
       case chrome.developerPrivate.ExtensionState.ENABLED:
       case chrome.developerPrivate.ExtensionState.TERMINATED:
         return true;
+      case chrome.developerPrivate.ExtensionState.BLACKLISTED:
       case chrome.developerPrivate.ExtensionState.DISABLED:
         return false;
     }

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

@@ -105,6 +105,8 @@ cr.define('extension_item_tests', function() {
       expectTrue(item.$['enable-toggle'].checked);
       item.set('data.state', 'DISABLED');
       expectFalse(item.$['enable-toggle'].checked);
+      item.set('data.state', 'BLACKLISTED');
+      expectFalse(item.$['enable-toggle'].checked);
     });
 
     test(assert(TestNames.ElementVisibilityDeveloperState), function() {
@@ -301,9 +303,17 @@ cr.define('extension_item_tests', function() {
 
     test(assert(TestNames.EnableToggle), function() {
       expectFalse(item.$['enable-toggle'].disabled);
+
+      // Test case where user does not have permission.
       item.set('data.userMayModify', false);
       Polymer.dom.flush();
       expectTrue(item.$['enable-toggle'].disabled);
+
+      // Test case of a blacklisted extension.
+      item.set('data.userMayModify', true);
+      item.set('data.state', 'BLACKLISTED');
+      Polymer.dom.flush();
+      expectTrue(item.$['enable-toggle'].disabled);
     });
 
     test(assert(TestNames.RemoveButton), function() {