Bug 1706604 - Part 2: Strip the URI before create the channel in nsDocShell. r=smaug

The target query parameters will be stripped from the loading URI in
nsDocShell before creating the channel for the loading. We will only
strip the URI for top-level loading but not for frames. It's because
there is no need to strip frames if we've stripped in top-level already.

Differential Revision: https://phabricator.services.mozilla.com/D113843

docshell/base/nsDocShell.cpp

@@ -10447,6 +10447,9 @@ nsresult nsDocShell::DoURILoad(nsDocShellLoadState* aLoadState,
   nsLoadFlags loadFlags = aLoadState->CalculateChannelLoadFlags(
       mBrowsingContext, Some(uriModified), Some(isXFOError));
 
+  // Strip the target query parameters before creating the channel.
+  aLoadState->MaybeStripTrackerQueryStrings(mBrowsingContext);
+
   nsCOMPtr<nsIChannel> channel;
   if (DocumentChannel::CanUseDocumentChannel(aLoadState->URI())) {
     channel = DocumentChannel::CreateForDocument(aLoadState, loadInfo,