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 cd362b3b35583e3c181c09320ce94be5312ddb8d..65707bb99be32f9955f6cdddb5274536fb7d0207 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -827,6 +827,14 @@ 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());