Apply meta tag referrer policy for preloaded requests

Source/core/html/parser/HTMLDocumentParser.h

Index: Source/core/html/parser/HTMLDocumentParser.h
diff --git a/Source/core/html/parser/HTMLDocumentParser.h b/Source/core/html/parser/HTMLDocumentParser.h
index cdd5f0c3de9e66de846d8d1ea52ae6dc7947c763..5779c0bcbf6683e622e06eb025f6e3a31d851b76 100644
--- a/Source/core/html/parser/HTMLDocumentParser.h
+++ b/Source/core/html/parser/HTMLDocumentParser.h
@@ -100,6 +100,7 @@ public:
         HTMLInputCheckpoint inputCheckpoint;
         TokenPreloadScannerCheckpoint preloadScannerCheckpoint;
         bool startingScript;
+        String preloadedReferrerPolicy;
     };
     void didReceiveParsedChunkFromBackgroundParser(PassOwnPtr<ParsedChunk>);
     void didReceiveEncodingDataFromBackgroundParser(const DocumentEncodingData&);