Simplify, and tweak, a couple of PDFJSDev checks

This removes a couple of, thanks to preceeding code, unnecessary `typeof PDFJSDev` checks, and also fixes a couple of incorrectly implemented (my fault) checks intended for `TESTING` builds.

src/core/jpg.js

@@ -1291,7 +1291,10 @@ var JpegImage = (function JpegImageClosure() {
     },
 
     getData({ width, height, forceRGB = false, isSourcePDF = false }) {
-      if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("TESTING && !LIB")) {
+      if (
+        typeof PDFJSDev === "undefined" ||
+        PDFJSDev.test("!PRODUCTION || TESTING")
+      ) {
         assert(
           isSourcePDF === true,
           'JpegImage.getData: Unexpected "isSourcePDF" value for PDF files.'

src/display/api.js

@@ -1639,7 +1639,6 @@ const PDFWorker = (function PDFWorkerClosure() {
         return worker.WorkerMessageHandler;
       }
       if (
-        typeof PDFJSDev !== "undefined" &&
         PDFJSDev.test("GENERIC") &&
         isNodeJS &&
         // eslint-disable-next-line no-undef

src/pdf.js

@@ -53,7 +53,7 @@ if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
       return new PDFNetworkStream(params);
     });
   }
-} else if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("CHROME")) {
+} else if (PDFJSDev.test("CHROME")) {
   let PDFNetworkStream = require("./display/network.js").PDFNetworkStream;
   let PDFFetchStream;
   let isChromeWithFetchCredentials = function() {

src/shared/message_handler.js

@@ -51,9 +51,10 @@ function wrapReason(reason) {
         (typeof reason === "object" && reason !== null),
       'wrapReason: Expected "reason" to be a (possibly cloned) Error.'
     );
-  }
-  if (typeof reason !== "object" || reason === null) {
-    return reason;
+  } else {
+    if (typeof reason !== "object" || reason === null) {
+      return reason;
+    }
   }
   switch (reason.name) {
     case "AbortException":

web/app.js

@@ -731,10 +731,7 @@ const PDFViewerApplication = {
       if (key === "docBaseUrl" && !value) {
         if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("PRODUCTION")) {
           value = document.URL.split("#")[0];
-        } else if (
-          typeof PDFJSDev !== "undefined" &&
-          PDFJSDev.test("MOZCENTRAL || CHROME")
-        ) {
+        } else if (PDFJSDev.test("MOZCENTRAL || CHROME")) {
           value = this.baseUrl;
         }
       }

web/ui_utils.js

@@ -745,7 +745,7 @@ function waitOnEventOrTimeout({ target, name, delay = 0 }) {
 const animationStarted = new Promise(function(resolve) {
   if (
     typeof PDFJSDev !== "undefined" &&
-    PDFJSDev.test("LIB") &&
+    PDFJSDev.test("LIB && TESTING") &&
     typeof window === "undefined"
   ) {
     // Prevent "ReferenceError: window is not defined" errors when running the