Add a new audio extension event OnLevelChanged.

extensions/test/data/api_test/audio/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.
 
+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) {
         var outputFound = false;
         var inputFound = false;
         for (var i = 0; i < outputInfo.length; ++i) {
           if (outputInfo[i].isActive) {
             chrome.test.assertTrue(outputInfo[i].id == output_id);
             outputFound = true;
           }
@@ skipping 59 matching lines @@
           verifyDeviceProperties(outputInfo.id, inputInfo.id,
                                  outputProps, inputProps);
     }));
   }));
 }
 
 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);
+    }));
+  },
+
   function setActiveDevicesTest() {
     chrome.audio.getInfo(
         chrome.test.callbackPass(function(outputInfo, inputInfo) {
           setActiveDevicesAndVerify(outputInfo[2].id, inputInfo[1].id);
     }));
   },
 
   function setPropertiesTest() {
     chrome.audio.getInfo(
         chrome.test.callbackPass(function(outputInfo, inputInfo) {
           setPropertiesAndVerify(outputInfo[0], inputInfo[1]);
     }));
   }
 ]);