Preserve referrer across CORS-enabled redirects

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h

Index: third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
diff --git a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
index 972996099f31033f8868e9484e7961eeec568725..27ad6a6838b21e7de01bcc37904071a3a43cf17d 100644
--- a/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
+++ b/third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h
@@ -40,6 +40,7 @@
 #include "platform/heap/Handle.h"
 #include "platform/network/HTTPHeaderMap.h"
 #include "platform/network/ResourceError.h"
+#include "platform/weborigin/Referrer.h"
 #include "wtf/Forward.h"
 #include "wtf/WeakPtr.h"
 #include "wtf/text/WTFString.h"
@@ -224,6 +225,12 @@ class CORE_EXPORT DocumentThreadableLoader final : public ThreadableLoader, priv
 
         WebURLRequest::FetchRedirectMode m_redirectMode;
 
+        // Holds the referrer after a redirect response was
+        // received. This referrer is used to populate the HTTP Referer
+        // header when following the redirect.
+        bool m_didRedirect;
+        Referrer m_referrerAfterRedirect;
+
         WeakPtrFactory<DocumentThreadableLoader> m_weakFactory;
     };