Bug 1431533: Part 5a - Auto-rewrite code to use ChromeUtils import methods. r=florian

This was done using the following script:
37e3803c7a/processors/chromeutils-import.jsm

MozReview-Commit-ID: 1Nc3XDu0wGl

dom/base/SlowScriptDebug.js

@@ -4,7 +4,7 @@
 
 "use strict";
 
-Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
 
 function SlowScriptDebug() { }