Persist browseraction properties across restarts

chrome/test/data/extensions/api_test/browser_action/default_persistence/background.js

+// Copyright 2014 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.
+
+// Set a background color for the badge at OnInstalled().
+chrome.runtime.onInstalled.addListener(function() {
+  chrome.browserAction.setBadgeBackgroundColor({color: [0, 0, 255, 255]});
+});
+
+// Every startup, change the badge text, but not the background color (which
+// should persist at the blue we set originally).
+chrome.runtime.onStartup.addListener(function() {
+  chrome.browserAction.setBadgeText({text: 'Hello'});
+});