Construct frame hierarchy using first request originating from it

webrequest.js

Index: webrequest.js
===================================================================
--- a/webrequest.js
+++ b/webrequest.js
@@ -67,6 +67,8 @@
 
   if (type == "main_frame" || type == "sub_frame")
     recordFrame(details.tabId, details.frameId, details.parentFrameId, details.url);
+  else if (details.tabId in frames && !(details.frameId in frames[details.tabId]))
+    recordFrame(details.tabId, details.frameId, details.parentFrameId, null);
 
   if (type == "main_frame")
     return {};
@@ -147,6 +149,15 @@
 {
   if (!(tabId in frames))
     frames[tabId] = {};
+
+  if (frameUrl == null)
+  {
+    if (tabId in frames && parentFrameId in frames[tabId])

[Wladimir Palant, 2013/11/13 12:03:03]

No point for the |tabId in frames| part of the check - it is already known to be
there (see if block above).

+      frameUrl = frames[tabId][parentFrameId].url;
+    else
+      return;  // We cannot do anything meaningful here
+  }
+
   frames[tabId][frameId] = {url: frameUrl, parent: parentFrameId};
 }