Allow webkitSpeechRecognition work from an app's background page.

chrome/test/data/extensions/platform_apps/speech/background_page/test.js

+// Copyright 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.
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.test.runTests([
+    function testWebkitSpeechRecognition() {
+      var succeeded = false;
+
+      var r = new webkitSpeechRecognition();
+      r.onerror = function(e) {
+        if (succeeded) {
+          return;
+        }

[not at google - send to devlin, 2013/09/20 22:36:46]

when does it get onerror?

[lazyboy, 2013/09/20 22:49:08]

When "audioCapture" permission is missing from the app's manifest.json.

[not at google - send to devlin, 2013/09/20 23:03:41]

Ok. The manifest.json here has "audioCapture" though. Perhaps you should add two
separate tests here.

[lazyboy, 2013/09/21 00:48:04]

Added separate test w/o permission.

+        chrome.test.fail();
+      };
+      r.onstart = function() {
+        succeeded = true;
+        chrome.test.succeed();
+      };
+      r.start();
+    }
+  ]);
+});