Add support for rel=next to Prerender in Blink.

Source/core/html/LinkRelAttribute.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 namespace WebCore {
 
 LinkRelAttribute::LinkRelAttribute()
     : m_iconType(InvalidIcon)
     , m_isStyleSheet(false)
     , m_isAlternate(false)
     , m_isDNSPrefetch(false)
     , m_isLinkPrefetch(false)
     , m_isLinkSubresource(false)
     , m_isLinkPrerender(false)
+    , m_isLinkNext(false)
     , m_isImport(false)
 {
 }
 
 LinkRelAttribute::LinkRelAttribute(const String& rel)
     : m_iconType(InvalidIcon)
     , m_isStyleSheet(false)
     , m_isAlternate(false)
     , m_isDNSPrefetch(false)
     , m_isLinkPrefetch(false)
     , m_isLinkSubresource(false)
     , m_isLinkPrerender(false)
+    , m_isLinkNext(false)
     , m_isImport(false)
 {
     if (equalIgnoringCase(rel, "stylesheet"))
         m_isStyleSheet = true;
     else if (equalIgnoringCase(rel, "icon") || equalIgnoringCase(rel, "shortcut icon"))
         m_iconType = Favicon;
 #if ENABLE(TOUCH_ICON_LOADING)
     else if (equalIgnoringCase(rel, "apple-touch-icon"))
         m_iconType = TouchIcon;
     else if (equalIgnoringCase(rel, "apple-touch-icon-precomposed"))
@@ skipping 20 matching lines @@
                 m_isAlternate = true;
             else if (equalIgnoringCase(*it, "icon"))
                 m_iconType = Favicon;
 #if ENABLE(TOUCH_ICON_LOADING)
             else if (equalIgnoringCase(*it, "apple-touch-icon"))
                 m_iconType = TouchIcon;
             else if (equalIgnoringCase(*it, "apple-touch-icon-precomposed"))
                 m_iconType = TouchPrecomposedIcon;
 #endif
             else if (equalIgnoringCase(*it, "prefetch"))
-              m_isLinkPrefetch = true;
+                m_isLinkPrefetch = true;
             else if (equalIgnoringCase(*it, "subresource"))
-              m_isLinkSubresource = true;
+                m_isLinkSubresource = true;
             else if (equalIgnoringCase(*it, "prerender"))
-              m_isLinkPrerender = true;
+                m_isLinkPrerender = true;
+            else if (equalIgnoringCase(*it, "next"))
+                m_isLinkNext = true;
         }
     }
 }
 
 }