PlzNavigate: Move navigation-level mixed content checks to the browser.

net/url_request/url_request.cc

Index: net/url_request/url_request.cc
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index 75eb4220106fe424eb49df9492143b2558913953..46fb1f48b29cf0275cbf0da3121a8321ecd1954b 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -855,6 +855,14 @@ void URLRequest::FollowDeferredRedirect() {
   job_->FollowDeferredRedirect();
 }
 
+const GURL& URLRequest::GetDeferredRedirectUrl() {
+  DCHECK(job_.get());
+  DCHECK(status_.is_success());
+  DCHECK(is_redirecting_);
+
+  return job_->deferred_redirect_info().new_url;
+}
+
 void URLRequest::SetAuth(const AuthCredentials& credentials) {
   DCHECK(job_.get());
   DCHECK(job_->NeedsAuth());