Added ActivityLog tests and associated bugfixes/extra logging.

chrome/test/data/extensions/activity_log_app/background.js

Index: chrome/test/data/extensions/activity_log_app/background.js
diff --git a/chrome/test/data/extensions/activity_log_app/background.js b/chrome/test/data/extensions/activity_log_app/background.js
index 34f67fc118e55dfba08c22eb9d901c19e2568938..add0e8f23975c8da7119d296e9293b4b2c813d29 100644
--- a/chrome/test/data/extensions/activity_log_app/background.js
+++ b/chrome/test/data/extensions/activity_log_app/background.js
@@ -1,7 +1,6 @@
 // Copyright (c) 2013 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.
-
 function recordDevice(device) {
   console.log("recordDevice");
 }
@@ -11,3 +10,12 @@ chrome.app.runtime.onLaunched.addListener(function() {
   chrome.bluetooth.startDiscovery({deviceCallback: recordDevice});
   chrome.bluetooth.stopDiscovery();
 });
+
+chrome.runtime.onMessageExternal.addListener(
+    function(message, sender, response) {
+  response();
+});
+
+chrome.runtime.onConnectExternal.addListener(function(port) {
+  console.log("connected");
+});