Init PDFWorker via MesssagePort.

external/dist/webpack.js

@@ -0,0 +1,21 @@
+/* Copyright 2017 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+'use strict';
+
+var pdfjs = require('./build/pdf.js');
+var PdfjsWorker = require('worker-loader!./build/pdf.worker.js');
+pdfjs.PDFJS.workerPort = new PdfjsWorker();
+
+module.exports = pdfjs;