PlzNavigate: add support for BLOCK_REQUEST during redirects

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index e08de5755b08783c751151e708b3c9f74494b4b2..a1b6e73d4acca45a20cb1aa7a0b678bd3e0a695a 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -735,6 +735,14 @@ void NavigationRequest::OnRedirectChecksComplete(
     return;
   }
 
+  if (result == NavigationThrottle::BLOCK_REQUEST) {
+    OnRequestFailed(false, net::ERR_BLOCKED_BY_CLIENT);
+
+    // DO NOT ADD CODE after this. The previous call to OnRequestFailed has
+    // destroyed the NavigationRequest.
+    return;
+  }
+
   loader_->FollowRedirect();
 }