Add W3C encrypted-media tests

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

+function runTest(config,qualifier) {
+
+    var testname = testnamePrefix(qualifier, config.keysystem)
+                                    + ', temporary, '
+                                    + /video\/([^;]*)/.exec(config.videoType)[1]
+                                    + ', playback, ' + config.testcase;
+
+    var configuration = {   initDataTypes: [ config.initDataType ],
+                            audioCapabilities: [ { contentType: config.audioType } ],
+                            videoCapabilities: [ { contentType: config.videoType } ],
+                            sessionTypes: [ 'temporary' ] };
+
+    async_test(function(test) {
+
+        var _video = config.video,
+            _mediaKeys,
+            _mediaKeySession,
+            _mediaSource;
+
+        function onFailure(error) {
+            forceTestFailureFromPromise(test, error);
+        }
+
+        function onEncrypted(event) {
+            assert_equals(event.target, _video);
+            assert_true(event instanceof window.MediaEncryptedEvent);
+            assert_equals(event.type, 'encrypted');
+
+            // Only create the session for the firs encrypted event
+            if (_mediaKeySession !== undefined) return;
+
+            var initDataType = config.initData ? config.initDataType : event.initDataType;
+            var initData = config.initData || event.initData;
+
+            _mediaKeySession = _mediaKeys.createSession('temporary');
+            waitForEventAndRunStep('message', _mediaKeySession, onMessage, test);
+            _mediaKeySession.generateRequest( initDataType, initData ).catch(onFailure);
+        }
+
+        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 event.target.update(response);
+            }).catch(onFailure);
+        }
+
+        function onPlaying(event) {
+            // Not using waitForEventAndRunStep() to avoid too many
+            // EVENT(onTimeUpdate) logs.
+            _video.addEventListener('timeupdate', onTimeupdate, true);
+        }
+
+        function onTimeupdate(event) {
+            if ( _video.currentTime > (config.duration || 1)) {
+                _video.pause();
+                test.done();
+            }
+        }
+
+        navigator.requestMediaKeySystemAccess(config.keysystem, [configuration]).then(function(access) {
+            return access.createMediaKeys();
+        }).then(function(mediaKeys) {
+            _mediaKeys = mediaKeys;
+            return _video.setMediaKeys(_mediaKeys);
+        }).then(function(){
+            waitForEventAndRunStep('encrypted', _video, onEncrypted, test);
+            waitForEventAndRunStep('playing', _video, onPlaying, test);
+            return testmediasource(config);
+        }).then(function(source) {
+            _mediaSource = source;
+            _video.src = URL.createObjectURL(_mediaSource);
+            return source.done;
+        }).then(function(){
+            _video.play();
+        }).catch(onFailure);
+    }, testname);
+}