Fix Link header parsing bug with extension parameter parsing.

Source/core/loader/LinkHeader.h

Index: Source/core/loader/LinkHeader.h
diff --git a/Source/core/loader/LinkHeader.h b/Source/core/loader/LinkHeader.h
index af14abf0e417ff36d1b8fbb8ad73d4c29061eba1..1067c8b82d45f7f6b34d022d02b03add02373dc6 100644
--- a/Source/core/loader/LinkHeader.h
+++ b/Source/core/loader/LinkHeader.h
@@ -22,9 +22,15 @@ public:
     bool valid() const { return m_isValid; }
 
     enum LinkParameterName {
-        LinkParameterUnknown,
         LinkParameterRel,
         LinkParameterAnchor,
+        LinkParameterTitle,
+        LinkParameterMedia,
+        LinkParameterType,
+        LinkParameterRev,
+        LinkParameterHreflang,
+        // Beyond this point, only link-extension parameters
+        LinkParameterUnknown,
         LinkParameterCrossOrigin,
     };