Add <link rel=preconnect> crossorigin attribute (take 2)

public/platform/WebPrescientNetworking.h

Index: public/platform/WebPrescientNetworking.h
diff --git a/public/platform/WebPrescientNetworking.h b/public/platform/WebPrescientNetworking.h
index 78b64610d137aa56d5b470b4e42c970e7448f679..d1d99e32d2f755b094e5098446ad0d689662808f 100644
--- a/public/platform/WebPrescientNetworking.h
+++ b/public/platform/WebPrescientNetworking.h
@@ -32,6 +32,7 @@
 #define WebPrescientNetworking_h
 
 #include "WebCommon.h"
+#include "WebCrossOriginAttribute.h"
 #include "WebString.h"
 #include "WebURL.h"
 
@@ -46,6 +47,8 @@ public:
     virtual void prefetchDNS(const WebString& hostname) { }
 
     virtual void preconnect(const WebURL& url) { }
+
+    virtual void preconnect(const WebURL& url, const CrossOriginAttributeValue value) { }
 };
 
 } // namespace blink