Bug 1071709 - Don't register Pdf.js mime handlers twice in the parent, fix for startup perf regression. r=mconley

browser/extensions/pdfjs/content/pdfjschildbootstrap.js

@@ -24,12 +24,14 @@
  * initializing our built-in version of pdfjs when running remote.
  */
 
+Components.utils.import('resource://gre/modules/Services.jsm');
 Components.utils.import('resource://pdf.js/PdfJs.jsm');
 Components.utils.import('resource://pdf.js/PdfjsContentUtils.jsm');
 
 // init content utils shim pdfjs will use to access privileged apis.
 PdfjsContentUtils.init();
 
-// register various pdfjs factories that hook us into content loading.
-PdfJs.updateRegistration();
-
+if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
+  // register various pdfjs factories that hook us into content loading.
+  PdfJs.updateRegistration();
+}