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 39d1cdda2295ceea1f59a44cc804be47a981b169..9f7d81806db9cee8d4d05dd5fb96702d69c9c026 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -715,6 +715,14 @@ 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();
 }