Adding `content_security_policy` to a few sample extensions.

chrome/common/extensions/docs/examples/api/notifications/options.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*
+  Grays out or [whatever the opposite of graying out is called] the option
+  field.
+*/
+function ghost(isDeactivated) {
+  options.style.color = isDeactivated ? 'graytext' : 'black';
+                                              // The label color.
+  options.frequency.disabled = isDeactivated; // The control manipulability.
+}
+
+window.addEventListener('load', function() {
+  // Initialize the option controls.
+  options.isActivated.checked = JSON.parse(localStorage.isActivated);
+                                         // The display activation.
+  options.frequency.value = localStorage.frequency;
+                                         // The display frequency, in minutes.
+
+  if (!options.isActivated.checked) { ghost(true); }
+
+  // Set the display activation and frequency.
+  options.isActivated.onchange = function() {
+    localStorage.isActivated = options.isActivated.checked;
+    ghost(!options.isActivated.checked);
+  };
+
+  options.frequency.onchange = function() {
+    localStorage.frequency = options.frequency.value;
+  };
+});