Bug 1456035: Part 4 - Convert callers of XPCOMUtils.generateQI to ChromeUtils.generateQI. r=mccr8

This also removes any redundant Ci.nsISupports elements in the interface
lists.

This was done using the following script:

acecb401b7/processors/chromeutils-generateQI.jsm

MozReview-Commit-ID: AIx10P8GpZY

toolkit/components/processsingleton/MainProcessSingleton.js

@@ -13,8 +13,8 @@ ChromeUtils.defineModuleGetter(this, "NetUtil",
 function MainProcessSingleton() {}
 MainProcessSingleton.prototype = {
   classID: Components.ID("{0636a680-45cb-11e4-916c-0800200c9a66}"),
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
-                                         Ci.nsISupportsWeakReference]),
+  QueryInterface: ChromeUtils.generateQI([Ci.nsIObserver,
+                                          Ci.nsISupportsWeakReference]),
 
   // Called when a webpage calls window.external.AddSearchProvider
   addSearchEngine({ target: browser, data: { pageURL, engineURL } }) {