Add LayoutTests for URL list of Response

third_party/WebKit/Source/modules/fetch/Response.h

Index: third_party/WebKit/Source/modules/fetch/Response.h
diff --git a/third_party/WebKit/Source/modules/fetch/Response.h b/third_party/WebKit/Source/modules/fetch/Response.h
index 0fdd3c6f4420d18c8d489fcc6f8d4e28a4f67783..1882552fd9fb063921566ef7de83eae97e5c31f3 100644
--- a/third_party/WebKit/Source/modules/fetch/Response.h
+++ b/third_party/WebKit/Source/modules/fetch/Response.h
@@ -15,6 +15,8 @@
 #include "modules/fetch/Headers.h"
 #include "platform/blob/BlobData.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Vector.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
@@ -94,6 +96,8 @@ class MODULES_EXPORT Response final : public Body {
   String mimeType() const override;
   String internalMIMEType() const;
 
+  const Vector<KURL>& internalURLList() const;
+
   DECLARE_VIRTUAL_TRACE();
 
  private: