1 files changed, 9 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/html/trust_token_attribute_parsing.cc b/chromium/third_party/blink/renderer/core/html/trust_token_attribute_parsing.cc
index 0724901f6f1..5f67023e60f 100644
--- a/chromium/third_party/blink/renderer/core/html/trust_token_attribute_parsing.cc
+++ b/chromium/third_party/blink/renderer/core/html/trust_token_attribute_parsing.cc
@@ -6,6 +6,7 @@
 #include "services/network/public/mojom/trust_tokens.mojom-blink.h"
 #include "services/network/public/mojom/trust_tokens.mojom-shared.h"
 #include "third_party/blink/renderer/bindings/core/v8/v8_trust_token.h"
+#include "third_party/blink/renderer/core/fetch/trust_token_to_mojom.h"
 #include "third_party/blink/renderer/platform/json/json_values.h"
 #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
 
@@ -133,6 +134,14 @@ network::mojom::blink::TrustTokenParamsPtr TrustTokenParamsFromJson(
     }
   }
 
+  // |additionalSigningData| is optional.
+  if (JSONValue* additional_signing_data =
+          object->Get("additionalSigningData")) {
+    if (!additional_signing_data->AsString(
+            &ret->possibly_unsafe_additional_signing_data))
+      return nullptr;
+  }
+
   return ret;
 }