Add W3C encrypted-media tests

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

+function runTest(configEncrypted,configClear,qualifier) {
+
+    var testname = testnamePrefix(qualifier, configEncrypted.keysystem)
+                                    + ', temporary, '
+                                    + /video\/([^;]*)/.exec(configEncrypted.videoType)[1]
+                                    + ', playback, encrypted and clear sources';
+
+    var configuration = {   initDataTypes: [ configEncrypted.initDataType ],
+                            audioCapabilities: [ { contentType: configEncrypted.audioType } ],
+                            videoCapabilities: [ { contentType: configEncrypted.videoType } ],
+                            sessionTypes: [ 'temporary' ] };
+
+    async_test(function(test) {
+        var playbackCount = 0,
+            _video = configEncrypted.video,
+            _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']);
+
+            configEncrypted.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(configEncrypted.initData ? configEncrypted.initDataType : event.initDataType,
+                                                configEncrypted.initData || event.initData).then(function(){
+                return _video.setMediaKeys(_mediaKeys);
+            }).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 < (configEncrypted.duration || 0.5)) {
+                return;
+            }
+
+            _video.removeEventListener('timeupdate', onTimeUpdate, true);
+
+            resetSrc().then(function(){
+                if (playbackCount >= 2) {
+                    test.done();
+                } else {
+                    playbackCount++;
+                    startPlayback();
+                }
+            }).catch(onFailure);
+        }
+
+        function resetSrc() {
+            _video.pause();
+            _video.removeAttribute('src');
+            _video.load();
+            return _video.setMediaKeys(null);
+        }
+
+        function startPlayback() {
+            // Alternate between encrypted and unencrypted files.
+            if (playbackCount % 2) {
+                // Unencrypted files don't require MediaKeys
+                testmediasource( configClear ).then(function( source ) {
+                    _mediaSource = source;
+                    _video.src = URL.createObjectURL(_mediaSource);
+                    _video.play();
+                }).catch(onFailure);
+            } else {
+                navigator.requestMediaKeySystemAccess(configEncrypted.keysystem, [ configuration ]).then(function(access) {
+                    return access.createMediaKeys();
+                }).then(function(mediaKeys) {
+                    _mediaKeys = mediaKeys;
+                    _mediaKeySession = _mediaKeys.createSession( 'temporary' );
+                }).then(function() {
+                    return testmediasource(configEncrypted);
+                }).then(function(source) {
+                    _mediaSource = source;
+                    _video.src = URL.createObjectURL(_mediaSource);
+                    return source.done;
+                }).then(function(){
+                    _video.play();
+                }).catch(onFailure);
+            }
+        }
+
+        waitForEventAndRunStep('encrypted', _video, onEncrypted, test);
+        waitForEventAndRunStep('playing', _video, onPlaying, test);
+        startPlayback();
+    }, testname);
+}