Allow multiple URL.createObjectURL invocations for MediaSource

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

Index: third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-multiple-attach.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-multiple-attach.html b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-multiple-attach.html
index 6cc7bdc69152409879fb1b8949e00413d587865c..313dcf9edbf33270df3965872edfe795036afaa7 100644
--- a/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-multiple-attach.html
+++ b/third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-multiple-attach.html
@@ -108,6 +108,14 @@
                   test.done();
               });
           }, 'Test that MediaSource can reattach if closed first');
+
+          mediasource_test(function(test, mediaElement, mediaSource) {
+              assert_equals(mediaSource.readyState, 'open', 'Source open');
+              var url1 = URL.createObjectURL(mediaSource);
+              var url2 = URL.createObjectURL(mediaSource);
+              assert_not_equals(url1, url2, 'URLs not unique');
+              test.done();
+          }, 'Calling URL.createObjectURL multiple times should generate unique URLs each time');

[wolenetz, 2016/07/11 18:03:17]

I like this new test. Please also consider adding coverage that verifies that
url1, if revoked, doesn't prevent url2 from being used to dereference
mediaSource (and that url1, once revoked, can't be used to dereference
mediaSource). The latter might overlap existing coverage a little, but I think
would still add value given that we're testing more than one objectURL for the
same mediaSource here.

[servolk, 2016/07/11 18:13:25]

Done.

         </script>
     </body>
 </html>