Issue 3208 - Move getFrames() function from child/elemHide module into a shared child/utils module

lib/child/elemHide.js

Index: lib/child/elemHide.js
===================================================================
--- a/lib/child/elemHide.js
+++ b/lib/child/elemHide.js
@@ -28,51 +28,28 @@ try
     delete proto.Components;
 }
 catch (e)
 {
   Cu.reportError(e);
 }
 
 let {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
-let {PrivateBrowsingUtils} = Cu.import("resource://gre/modules/PrivateBrowsingUtils.jsm")
 
 let {Utils} = require("utils");
+let {getFrames} = require("child/utils");
 
 let messageID = 0;
 
 // The allowXBL binding below won't have any effect on the element. For elements
 // that should be hidden however we don't return any binding at all, this makes
 // Gecko stop constructing the node - it cannot be shown.
 const allowXBL = "<bindings xmlns='http://www.mozilla.org/xbl'><binding id='dummy' bindToUntrustedContent='true'/></bindings>";
 const hideXBL = "<bindings xmlns='http://www.mozilla.org/xbl'/>";
 
-function getFrames(window)
-{
-  let frames = [];
-  while (window)
-  {
-    let frame = {
-      location: window.location.href,
-      sitekey: null
-    };
-
-    let documentElement = window.document && window.document.documentElement;
-    if (documentElement)
-      frame.sitekey = documentElement.getAttribute("data-adblockkey")
-
-    if (window == window.parent)
-      frame.privateBrowsing = PrivateBrowsingUtils.isWindowPrivate(window);
-
-    frames.push(frame);
-    window = (window != window.parent ? window.parent : null);
-  }
-  return frames;
-}
-
 /**
  * about: URL module used to count hits.
  * @class
  */
 let AboutHandler =
 {
   classID: Components.ID("{55fb7be0-1dd2-11b2-98e6-9e97caf8ba67}"),
   classDescription: "Element hiding hit registration protocol handler",