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diff --git a/addons/website_slides/static/lib/pdfjs/worker_loader.js b/addons/website_slides/static/lib/pdfjs/worker_loader.js
new file mode 100644
index 00000000000..21f05bd1963
--- /dev/null
+++ b/addons/website_slides/static/lib/pdfjs/worker_loader.js
@@ -0,0 +1,81 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2012 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.
+ */
+ /* globals PDFJS, Util */
+
+'use strict';
+
+// List of shared files to include;
+var sharedFiles = [
+  'shared/util.js'
+];
+
+// List of other files to include;
+var otherFiles = [
+  'core/network.js',
+  'core/chunked_stream.js',
+  'core/pdf_manager.js',
+  'core/core.js',
+  'core/obj.js',
+  'core/charsets.js',
+  'core/annotation.js',
+  'core/function.js',
+  'core/colorspace.js',
+  'core/crypto.js',
+  'core/pattern.js',
+  'core/evaluator.js',
+  'core/cmap.js',
+  'core/fonts.js',
+  'core/font_renderer.js',
+  'core/glyphlist.js',
+  'core/image.js',
+  'core/metrics.js',
+  'core/parser.js',
+  'core/ps_parser.js',
+  'core/stream.js',
+  'core/worker.js',
+  'core/arithmetic_decoder.js',
+  'core/jpg.js',
+  'core/jpx.js',
+  'core/jbig2.js',
+  'core/bidi.js',
+  'core/murmurhash3.js'
+];
+
+function loadInOrder(index, path, files) {
+  if (index >= files.length) {
+    PDFJS.fakeWorkerFilesLoadedCapability.resolve();
+    return;
+  }
+  PDFJS.Util.loadScript(path + files[index],
+                  loadInOrder.bind(null, ++index, path, files));
+}
+
+// Load all the files.
+if (typeof PDFJS === 'undefined' || !PDFJS.fakeWorkerFilesLoadedCapability) {
+  var files = sharedFiles.concat(otherFiles);
+  for (var i = 0; i < files.length; i++) {
+    importScripts(files[i]);
+  }
+} else {
+  var src = PDFJS.workerSrc;
+  var path = src.substr(0, src.indexOf('worker_loader.js'));
+  // If Util is available, we assume that shared files are already loaded. Can
+  // happen that they are not if PDF.js is bundled inside a special namespace.
+  var skipShared = typeof Util !== 'undefined';
+  var files = skipShared ? otherFiles : sharedFiles.concat(otherFiles);
+  loadInOrder(0, path, files);
+}