Handle <link rel=prerender> in chrome.

webkit/glue/resource_type.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_GLUE_RESOURCE_TYPE_H__
 #define WEBKIT_GLUE_RESOURCE_TYPE_H__
 
 #include "base/basictypes.h"
 
 class ResourceType {
  public:
   enum Type {
     MAIN_FRAME = 0,  // top level page
     SUB_FRAME,       // frame or iframe
     STYLESHEET,      // a CSS stylesheet
     SCRIPT,          // an external script
     IMAGE,           // an image (jpg/gif/png/etc)
     FONT_RESOURCE,   // a font
     SUB_RESOURCE,    // an "other" subresource.
     OBJECT,          // an object (or embed) tag for a plugin,
                      // or a resource that a plugin requested.
     MEDIA,           // a media resource.
     WORKER,          // the main resource of a dedicated worker.
     SHARED_WORKER,   // the main resource of a shared worker.
     PREFETCH,        // an explicitly requested prefetch
+    PRERENDER,       // an explicitly requested prerender
     FAVICON,         // a favicon
     LAST_TYPE        // Place holder so we don't need to change ValidType
                      // everytime.
   };
 
   static bool ValidType(int32 type) {
     return type >= MAIN_FRAME && type < LAST_TYPE;
   }
 
   static Type FromInt(int32 type) {
@@ skipping 16 matching lines @@
            type == SUB_RESOURCE ||
            type == WORKER;
   }
 
  private:
   // Don't instantiate this class.
   ResourceType();
   ~ResourceType();
 };
 #endif  // WEBKIT_GLUE_RESOURCE_TYPE_H__