Options: fix "Manage extension" link in controlled-by-extension bubbles

R=rdevlin.cronin@chromium.org
BUG=700312
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2745733004
Cr-Commit-Position: refs/heads/master@{#456239}

chrome/browser/resources/options/controlled_setting.js

@@ -174,9 +174,13 @@ cr.define('options', function() {
             '.controlled-setting-bubble-extension-manage-link');
         var extensionId = this.extensionId;
         manageLink.onclick = function() {
-          uber.invokeMethodOnWindow(
-              window.top, 'showPage',
-              {pageId: 'extensions', path: '?id=' + extensionId});
+          if (window != window.top) {
+            uber.invokeMethodOnWindow(
+                window.top, 'showPage',
+                {pageId: 'extensions', path: '?id=' + extensionId});
+          } else {
+            window.open('chrome://extensions/?id=' + extensionId);
+          }
         };
 
         var disableButton = extensionContainer.querySelector(