Add layout tests for the audio component of MediaStream Recording.

third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-audio-video.html

Index: third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-audio-video.html
diff --git a/third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-basic-video.html b/third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-audio-video.html
similarity index 79%
copy from third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-basic-video.html
copy to third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-audio-video.html
index 7021d36828689cb0fb5e7e1ebb821ae12b39a649..83eb86572d217fc38465ffddc98ecaf43cf289e7 100644
--- a/third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-basic-video.html
+++ b/third_party/WebKit/LayoutTests/fast/mediarecorder/MediaRecorder-audio-video.html
@@ -3,7 +3,7 @@
 <script src=../../resources/testharnessreport.js></script>
 <script>
 
-var test = async_test('checks the video-only MediaRecorder API.');
+var test = async_test('checks the combined audio and video MediaRecorder API.');
 var recorder;
 
 recorderOnDataAvailable = test.step_func(function(event) {
@@ -14,8 +14,8 @@ recorderOnDataAvailable = test.step_func(function(event) {
       assert_equals(recorder.state, "inactive");
     }
 
-    // TODO(mcasas): Let the test record for a while.
-    // TODO(mcasas): Consider storing the recorded data and playing it back.
+    // TODO(ajose): Let the test record for a while.
+    // TODO(ajose): Consider storing the recorded data and playing it back.
 
     recorder.onstop = recorderOnStopExpected;
     recorder.stop();
@@ -34,8 +34,9 @@ recorderOnError = test.step_func(function() {
 });
 
 gotStream = test.step_func(function(stream) {
-    assert_equals(stream.getAudioTracks().length, 0);
+    assert_equals(stream.getAudioTracks().length, 1);
     assert_equals(stream.getVideoTracks().length, 1);
+    assert_equals(stream.getAudioTracks()[0].readyState, 'live');
     assert_equals(stream.getVideoTracks()[0].readyState, 'live');
 
     try {
@@ -59,7 +60,7 @@ onError = test.step_func(function() {
 });
 
 try {
-    navigator.webkitGetUserMedia({video:true}, gotStream, onError);
+    navigator.webkitGetUserMedia({video:true, audio:true}, gotStream, onError);
 } catch(e) {
     assert_unreached('Exception launching getUserMedia(): ' + e);
 }