Plumb redirect info out of net, through content, and into child processes.

content/browser/loader/cross_site_resource_handler.cc

Index: content/browser/loader/cross_site_resource_handler.cc
diff --git a/content/browser/loader/cross_site_resource_handler.cc b/content/browser/loader/cross_site_resource_handler.cc
index 29dc77ea6b08b14babbce8b77910e99e17e32ab8..8996e14ee3d02cca77336f2f887b655321da0073 100644
--- a/content/browser/loader/cross_site_resource_handler.cc
+++ b/content/browser/loader/cross_site_resource_handler.cc
@@ -127,17 +127,12 @@ CrossSiteResourceHandler::~CrossSiteResourceHandler() {
 }
 
 bool CrossSiteResourceHandler::OnRequestRedirected(
-    const GURL& new_url,
+    const net::RedirectInfo& redirect_info,
     ResourceResponse* response,
     bool* defer) {
-  // Top-level requests change their cookie first-party URL on redirects, while
-  // subframes retain the parent's value.
-  if (GetRequestInfo()->GetResourceType() == ResourceType::MAIN_FRAME)
-    request()->set_first_party_for_cookies(new_url);
-
   // We should not have started the transition before being redirected.
   DCHECK(!in_cross_site_transition_);
-  return next_handler_->OnRequestRedirected(new_url, response, defer);
+  return next_handler_->OnRequestRedirected(redirect_info, response, defer);
 }
 
 bool CrossSiteResourceHandler::OnResponseStarted(