feat: migrate webRequest module to NetworkService (Part 8) (#19841)

* fix: fill uploadData property

* fix: requestHeaders in onBeforeSendHeaders

* fix: responseHeaders in onHeadersReceived

* fix: header keys should not be lowercased

* fix: gin::Dictionary::Get succeeds even though key does not exist...

* fix: throw for invalid filters

* test: re-enable api-web-request-spec

* chore: do not use deprecated base::Value API

shell/browser/net/proxying_url_loader_factory.cc

@@ -608,6 +608,8 @@ void ProxyingURLLoaderFactory::InProgressRequest::
   override_headers_ = nullptr;
   redirect_url_ = GURL();
 
+  info_->AddResponseInfoFromResourceResponse(current_response_);
+
   net::CompletionRepeatingCallback copyable_callback =
       base::AdaptCallbackForRepeating(std::move(continuation));
   DCHECK(info_.has_value());