Add support for rel=next to Prerender in Blink.

Source/platform/Prerender.cpp

Index: Source/platform/Prerender.cpp
diff --git a/Source/platform/Prerender.cpp b/Source/platform/Prerender.cpp
index be32567e715bca61015795cfc30565439bd407cc..a528aea30128637cb0ca332bd853bce1175998cb 100644
--- a/Source/platform/Prerender.cpp
+++ b/Source/platform/Prerender.cpp
@@ -38,14 +38,15 @@
 
 namespace WebCore {
 
-PassRefPtr<Prerender> Prerender::create(PrerenderClient* client, const KURL& url, const String& referrer, ReferrerPolicy policy)
+PassRefPtr<Prerender> Prerender::create(PrerenderClient* client, const KURL& url, unsigned relTypes, const String& referrer, ReferrerPolicy policy)
 {
-    return adoptRef(new Prerender(client, url, referrer, policy));
+    return adoptRef(new Prerender(client, url, relTypes, referrer, policy));
 }
 
-Prerender::Prerender(PrerenderClient* client, const KURL& url, const String& referrer, ReferrerPolicy policy)
+Prerender::Prerender(PrerenderClient* client, const KURL& url, const unsigned relTypes, const String& referrer, ReferrerPolicy policy)
     : m_client(client)
     , m_url(url)
+    , m_relTypes(relTypes)
     , m_referrer(referrer)
     , m_referrerPolicy(policy)
 {