Add SourceBuffer implementations of Audio/VideoTracks

third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html

Index: third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html
index 4fbc52b1f933e5cf68b9c05dfc12655b91bc1a7f..131e1d05683727ecd9dbf16088ea921b4a7fe022 100644
--- a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html
+++ b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-avtracks.html
@@ -14,37 +14,40 @@
           {
               var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);
               test.expectEvent(sourceBuffer, 'updateend', 'initSegment append ended.');
+              test.expectEvent(sourceBuffer.audioTracks, 'addtrack', 'sourceBuffer.videoTracks addtrack event');
+              test.expectEvent(sourceBuffer.videoTracks, 'addtrack', 'sourceBuffer.videoTracks addtrack event');
+              test.expectEvent(mediaElement.audioTracks, 'addtrack', 'mediaElement.videoTracks addtrack event');
+              test.expectEvent(mediaElement.videoTracks, 'addtrack', 'mediaElement.videoTracks addtrack event');
               sourceBuffer.appendBuffer(initSegment);
               test.waitForExpectedEvents(function()
               {
-                // TODO(servolk): Find a way to make tests more concise in JS
-                assert_equals(mediaElement.videoTracks.length, 1, "videoTracks.length");
-                assert_equals(mediaElement.videoTracks[0].id, "1", "videoTrack.id");
-                assert_equals(mediaElement.videoTracks[0].kind, "main", "videoTrack.kind");
-                assert_equals(mediaElement.videoTracks[0].label, "", "videoTrack.label");
-                assert_equals(mediaElement.videoTracks[0].language, "eng", "videoTrack.language");
-
-                assert_equals(mediaElement.audioTracks.length, 1, "audioTracks.length");
-                assert_equals(mediaElement.audioTracks[0].id, "2", "audioTrack.id");
-                assert_equals(mediaElement.audioTracks[0].kind, "main", "audioTrack.kind");
-                assert_equals(mediaElement.audioTracks[0].label, "", "audioTrack.label");
-                assert_equals(mediaElement.audioTracks[0].language, "eng", "audioTrack.language");
-
                 assert_equals(sourceBuffer.videoTracks.length, 1, "videoTracks.length");
                 assert_equals(sourceBuffer.videoTracks[0].id, "1", "videoTrack.id");
                 assert_equals(sourceBuffer.videoTracks[0].kind, "main", "videoTrack.kind");
                 assert_equals(sourceBuffer.videoTracks[0].label, "", "videoTrack.label");
                 assert_equals(sourceBuffer.videoTracks[0].language, "eng", "videoTrack.language");
+                assert_equals(sourceBuffer.videoTracks[0].sourceBuffer, sourceBuffer, "videoTrack.sourceBuffer");
+                // The first video track is selected by default.
+                assert_true(sourceBuffer.videoTracks[0].selected, "sourceBuffer.videoTracks[0].selected");
 
                 assert_equals(sourceBuffer.audioTracks.length, 1, "audioTracks.length");
                 assert_equals(sourceBuffer.audioTracks[0].id, "2", "audioTrack.id");
                 assert_equals(sourceBuffer.audioTracks[0].kind, "main", "audioTrack.kind");
                 assert_equals(sourceBuffer.audioTracks[0].label, "", "audioTrack.label");
                 assert_equals(sourceBuffer.audioTracks[0].language, "eng", "audioTrack.language");
+                assert_equals(sourceBuffer.audioTracks[0].sourceBuffer, sourceBuffer, "audioTrack.sourceBuffer");
+                // The first audio track is enabled by default.
+                assert_true(sourceBuffer.audioTracks[0].enabled, "sourceBuffer.audioTracks[0].enabled");
+
+                assert_equals(mediaElement.videoTracks.length, 1, "videoTracks.length");
+                assert_equals(mediaElement.videoTracks[0], sourceBuffer.videoTracks[0], "mediaElement.videoTrack == sourceBuffer.videoTrack");
+
+                assert_equals(mediaElement.audioTracks.length, 1, "audioTracks.length");
+                assert_equals(mediaElement.audioTracks[0], sourceBuffer.audioTracks[0], "mediaElement.audioTrack == sourceBuffer.audioTrack");
 
                 test.done();
               });
-          }, "MediaSource audio tracks");
+          }, "MediaSource media track properties");
         </script>
     </body>
 </html>