Update the NIK during the redirect for LPR Previews

Unblocks //net work that assumes NIK and site for cookie match.

Bug: 1053585
Change-Id: I249070ccad9540ffd13649887df6e63c00f9875f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2063934Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742794}

chrome/browser/previews/previews_lite_page_redirect_url_loader.cc

@@ -210,6 +210,13 @@ void PreviewsLitePageRedirectURLLoader::CreateRedirectInformation(
   modified_resource_request_.referrer = GURL(redirect_info_.new_referrer);
   modified_resource_request_.referrer_policy =
       redirect_info_.new_referrer_policy;
+
+  if (modified_resource_request_.trusted_params.has_value()) {
+    auto params = modified_resource_request_.trusted_params.value();
+    params.network_isolation_key = net::NetworkIsolationKey(
+        url::Origin::Create(redirect_url), url::Origin::Create(redirect_url));
+    modified_resource_request_.trusted_params = params;
+  }
 }
 
 void PreviewsLitePageRedirectURLLoader::OnResultDetermined(