Trace XHR response wrappers

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp

Index: third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
diff --git a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
index 941a9f3f5b5a05addf69f0f2cf90cd0298756e9f..3b259997e8ae8b7ee3dada39c8808666b4a4dc57 100644
--- a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
+++ b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp
@@ -1716,4 +1716,12 @@ DEFINE_TRACE(XMLHttpRequest)
     ActiveDOMObject::trace(visitor);
 }
 
+DEFINE_TRACE_WRAPPERS(XMLHttpRequest)
+{
+    visitor->traceWrappers(m_responseBlob);
+    visitor->traceWrappers(m_responseLegacyStream);
+    visitor->traceWrappers(m_responseDocument);
+    visitor->traceWrappers(m_responseArrayBuffer);
+}
+
 } // namespace blink