Add W3C encrypted-media tests

third_party/WebKit/LayoutTests/imported/wpt/encrypted-media/scripts/playback-temporary-two-videos.js

+function runTest(config,qualifier) {
+
+    var testname = testnamePrefix(qualifier, config.keysystem)
+                                    + ', temporary, '
+                                    + /video\/([^;]*)/.exec(config.videoType)[1]
+                                    + ', playback two videos';
+
+    var configuration = {   initDataTypes: [ config.initDataType ],
+                            audioCapabilities: [ { contentType: config.audioType } ],
+                            videoCapabilities: [ { contentType: config.videoType } ],
+                            sessionTypes: [ 'temporary' ] };
+
+    promise_test(function(test)
+    {
+        var promises = config.video.map(function(video) { return play_video_as_promise(test,video); });
+        return Promise.all(promises);
+
+    }, testname);
+
+    function play_video_as_promise(test, _video) {
+        var _mediaKeys,
+            _mediaKeySession,
+            _mediaSource;
+
+        function onFailure(error) {
+            forceTestFailureFromPromise(test, error);
+        }
+
+        function onMessage(event) {
+            assert_equals(event.target, _mediaKeySession);
+            assert_true(event instanceof window.MediaKeyMessageEvent);
+            assert_equals(event.type, 'message');
+
+            assert_in_array( event.messageType, ['license-request', 'individualization-request']);
+
+            config.messagehandler(event.messageType, event.message).then(function(response) {
+                return _mediaKeySession.update(response);
+            }).catch(onFailure);
+        }
+
+        function onEncrypted(event) {
+            assert_equals(event.target, _video);
+            assert_true(event instanceof window.MediaEncryptedEvent);
+            assert_equals(event.type, 'encrypted');
+
+            waitForEventAndRunStep('message', _mediaKeySession, onMessage, test);
+
+            _mediaKeySession.generateRequest(config.initData ? config.initDataType : event.initDataType,
+                                                config.initData || event.initData).catch(onFailure);
+        }
+
+        function wait_for_timeupdate_message(video)
+        {
+            return new Promise(function(resolve) {
+                video.addEventListener('timeupdate', function listener(event) {
+                    if (event.target.currentTime > (config.duration || 1))
+                    {
+                        video.removeEventListener('timeupdate', listener);
+                        resolve(event);
+                    }
+                });
+            });
+        };
+
+        return navigator.requestMediaKeySystemAccess(config.keysystem, [configuration]).then(function(access) {
+            return access.createMediaKeys();
+        }).then(function(mediaKeys) {
+            _mediaKeys = mediaKeys;
+            return _video.setMediaKeys(_mediaKeys);
+        }).then(function() {
+            _mediaKeySession = _mediaKeys.createSession('temporary');
+            waitForEventAndRunStep('encrypted', _video, onEncrypted, test);
+            return testmediasource(config);
+        }).then(function(source) {
+            _mediaSource = source;
+            _video.src = URL.createObjectURL(_mediaSource);
+            return source.done;
+        }).then(function(){
+            _video.play();
+            return wait_for_timeupdate_message(_video);
+        }).catch(onFailure);
+    }
+}