EME: Fail requestMediaKeySystemAccess if no capabilities specified

third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html

Index: third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html b/third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html
index de3962f06344e5a4aecb38d8551ced20a6ab3824..4e3a982df26202fd7d7c2711228a957d921321cc 100644
--- a/third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html
+++ b/third_party/WebKit/LayoutTests/http/tests/media/encrypted-media/encrypted-media-encrypted-event-different-origin.html
@@ -44,7 +44,10 @@
                 }
 
                 logMessage('starting');
-                navigator.requestMediaKeySystemAccess('org.w3.clearkey', [{}]).then(function(access) {
+                navigator.requestMediaKeySystemAccess(
+                    'org.w3.clearkey',
+                    [{audioCapabilities: [{contentType: 'audio/webm; codecs=vorbis'}]}])

[xhwang, 2017/02/02 18:31:20]

here and everywhere else, shall we specify two audioCapability in case we want
to run this on Android?

[jrummell, 2017/02/02 20:03:24]

Below the test plays a webm file, so it probably doesn't make sense to add a
second mp4 capability. The test(s) could be changed to look at the returned
config and decide which type of file to use, but that's a bigger change.

+                  .then(function(access) {
                     return access.createMediaKeys();
                 }).then(function(mediaKeys) {
                     video.addEventListener('encrypted', test.step_func(onEncrypted), true);