Add a new audio extension event OnLevelChanged.

extensions/test/data/api_test/audio/test.js

Index: extensions/test/data/api_test/audio/test.js
diff --git a/extensions/test/data/api_test/audio/test.js b/extensions/test/data/api_test/audio/test.js
index 74aea07309b8413a0c8a0faf321fe2e78dc5e3a7..15d6d67f2dd7efeb743b0d427539525a05604804 100644
--- a/extensions/test/data/api_test/audio/test.js
+++ b/extensions/test/data/api_test/audio/test.js
@@ -2,6 +2,60 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+function verifyGetInfoOutput(outputs) {
+  chrome.test.assertEq("30001", outputs[0].id);
+  chrome.test.assertEq("Jabra Speaker: Jabra Speaker 1", outputs[0].name);
+
+  chrome.test.assertEq("30002", outputs[1].id);
+  chrome.test.assertEq("Jabra Speaker: Jabra Speaker 2", outputs[1].name);
+
+  chrome.test.assertEq("30003", outputs[2].id);
+  chrome.test.assertEq("HDMI output: HDA Intel MID", outputs[2].name);
+}
+
+function verifyGetInfoInput(inputs) {
+  chrome.test.assertEq("40001", inputs[0].id);
+  chrome.test.assertEq("Jabra Mic: Jabra Mic 1", inputs[0].name);
+
+  chrome.test.assertEq("40002", inputs[1].id);
+  chrome.test.assertEq("Jabra Mic: Jabra Mic 2", inputs[1].name);
+
+  chrome.test.assertEq("40003", inputs[2].id);
+  chrome.test.assertEq("Webcam Mic: Logitech Webcam", inputs[2].name);
+}
+
+function verifyGetDeviceInfo(devices) {
+  chrome.test.assertEq("30001", devices[0].id);
+  chrome.test.assertFalse(devices[0].isInput);
+  chrome.test.assertEq("Jabra Speaker 1", devices[0].displayName);
+  chrome.test.assertEq("Jabra Speaker", devices[0].deviceName);
+
+  chrome.test.assertEq("30002", devices[1].id);
+  chrome.test.assertFalse(devices[1].isInput);
+  chrome.test.assertEq("Jabra Speaker 2", devices[1].displayName);
+  chrome.test.assertEq("Jabra Speaker", devices[1].deviceName);
+
+  chrome.test.assertEq("30003", devices[2].id);
+  chrome.test.assertFalse(devices[2].isInput);
+  chrome.test.assertEq("HDA Intel MID", devices[2].displayName);
+  chrome.test.assertEq("HDMI output", devices[2].deviceName);
+
+  chrome.test.assertEq("40001", devices[3].id);
+  chrome.test.assertTrue(devices[3].isInput);
+  chrome.test.assertEq("Jabra Mic 1", devices[3].displayName);
+  chrome.test.assertEq("Jabra Mic", devices[3].deviceName);
+
+  chrome.test.assertEq("40002", devices[4].id);
+  chrome.test.assertTrue(devices[4].isInput);
+  chrome.test.assertEq("Jabra Mic 2", devices[4].displayName);
+  chrome.test.assertEq("Jabra Mic", devices[4].deviceName);
+
+  chrome.test.assertEq("40003", devices[5].id);
+  chrome.test.assertTrue(devices[5].isInput);
+  chrome.test.assertEq("Logitech Webcam", devices[5].displayName);
+  chrome.test.assertEq("Webcam Mic", devices[5].deviceName);
+}
+
 function verifyActiveDevices(output_id, input_id) {
   chrome.audio.getInfo(
       chrome.test.callbackPass(function(outputInfo, inputInfo) {
@@ -81,6 +135,15 @@ chrome.test.runTests([
   function getInfoTest() {
     chrome.audio.getInfo(
         chrome.test.callbackPass(function(outputInfo, inputInfo) {
+          verifyGetInfoOutput(outputInfo);
+          verifyGetInfoInput(inputInfo);
+    }));
+  },
+
+  function getDeviceInfoTest() {
+    chrome.audio.getDeviceInfo(
+        chrome.test.callbackPass(function(devicesInfo) {
+          verifyGetDeviceInfo(devicesInfo);
     }));
   },