Bug 1352218, part 1 - Split pdf.js boot strap file. r=Gijs

One is always run, the other is only run when PdfJs.enabled is true in
the parent process. This refactoring enables the next patch.

The extensions changes are from:
  https://github.com/mozilla/pdf.js/pull/8218

MozReview-Commit-ID: HwQ3yk8Jck4

--HG--
extra : rebase_source : 94f1516989685176a95e235f2d3ef8658adaf8b7

browser/components/nsBrowserGlue.js

@@ -794,6 +794,9 @@ BrowserGlue.prototype = {
     // With older versions of the extension installed, this load will fail
     // passively.
     Services.ppmm.loadProcessScript("resource://pdf.js/pdfjschildbootstrap.js", true);
+    if (PdfJs.enabled) {
+      Services.ppmm.loadProcessScript("resource://pdf.js/pdfjschildbootstrap-enabled.js", true);
+    }
 
     if (AppConstants.platform == "win") {
       // For Windows 7, initialize the jump list module.

browser/extensions/pdfjs/content/pdfjschildbootstrap-enabled.js

@@ -0,0 +1,31 @@
+/* Copyright 2014 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 Components, PdfJs, Services */
+
+"use strict";
+
+/*
+ * pdfjschildbootstrap-enabled.js loads into the content process to
+ * take care of initializing our built-in version of pdfjs when
+ * running remote. It will only be run when PdfJs.enable is true.
+ */
+
+Components.utils.import("resource://gre/modules/Services.jsm");
+Components.utils.import("resource://pdf.js/PdfJs.jsm");
+
+if (Services.appinfo.processType === Services.appinfo.PROCESS_TYPE_CONTENT) {
+  // register various pdfjs factories that hook us into content loading.
+  PdfJs.updateRegistration();
+}

browser/extensions/pdfjs/content/pdfjschildbootstrap.js

@@ -12,7 +12,7 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-/* globals Components, PdfjsContentUtils, PdfJs, Services */
+/* globals Components, PdfjsContentUtils */
 
 "use strict";
 
@@ -21,14 +21,7 @@
  * 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();
-
-if (Services.appinfo.processType === Services.appinfo.PROCESS_TYPE_CONTENT) {
-  // register various pdfjs factories that hook us into content loading.
-  PdfJs.updateRegistration();
-}