Fix SSL redirects with PlzNavigate.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 60850fda2948793e1ef211bab495c073daaefdae..46b6402dd33ba7a137d79e758fddb3beace4126a 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1363,9 +1363,17 @@ void ResourceDispatcherHostImpl::ContinuePendingBeginRequest(
     new_request->set_first_party_url_policy(
         net::URLRequest::UPDATE_FIRST_PARTY_URL_ON_REDIRECT);
   }
-
-  const Referrer referrer(request_data.referrer, request_data.referrer_policy);
-  SetReferrerForRequest(new_request.get(), referrer);
+
+  // For PlzNavigate, this request has already been made and the referrer was
+  // checked previously. So don't set the referrer for this stream request, or
+  // else it will fail for SSL redirects since net/ will think the blob:https
+  // for the stream is not a secure scheme (specifically, in the call to
+  // ComputeReferrerForRedirect).
+  if (!is_navigation_stream_request) {
+    const Referrer referrer(
+        request_data.referrer, request_data.referrer_policy);
+    SetReferrerForRequest(new_request.get(), referrer);
+  }
 
   new_request->SetExtraRequestHeaders(headers);