chrome://settings - Provide method for pages to prevent themselves being shown.

chrome/browser/resources/options/password_manager.js

Index: chrome/browser/resources/options/password_manager.js
diff --git a/chrome/browser/resources/options/password_manager.js b/chrome/browser/resources/options/password_manager.js
index 9a100908386e61209c2105c22ef91b46c8e7df94..4f04b8444fe9b8c1fc5115cd0d6fb1b268ac3912 100644
--- a/chrome/browser/resources/options/password_manager.js
+++ b/chrome/browser/resources/options/password_manager.js
@@ -50,6 +50,11 @@ cr.define('options', function() {
     },
 
     /** @inheritDoc */
+    canShowPage: function() {
+      return !$('manage-passwords').disabled;

[stuartmorgan, 2011/02/12 01:09:06]

As with the other case, use a function that gives an answer, not the UI state.

[Evan Stade, 2011/02/12 03:06:42]

Done.

+    },
+
+    /** @inheritDoc */
     didShowPage: function() {
       // Updating the password lists may cause a blocking platform dialog pop up
       // (Mac, Linux), so we delay this operation until the page is shown.