Prepare to add more initiator info to CachedResource(Request)

Source/core/loader/cache/CachedResourceRequestInitiators.h

 /*
  * Copyright (C) 2012 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef CachedResourceRequestInitiators_h
 #define CachedResourceRequestInitiators_h
 
 #include "core/platform/ThreadGlobalData.h"
 #include <wtf/text/AtomicString.h>
 
 namespace WebCore {
 
 struct CachedResourceRequestInitiators {
     const AtomicString css;
+    const AtomicString document;
     const AtomicString icon;
+    const AtomicString link;
+    const AtomicString processinginstruction;
+    const AtomicString texttrack;
+    const AtomicString xml;
     const AtomicString xmlhttprequest;
     WTF_MAKE_NONCOPYABLE(CachedResourceRequestInitiators); WTF_MAKE_FAST_ALLOCATED;
 private:
     CachedResourceRequestInitiators();
     friend class ThreadGlobalData;
 };
 
 inline const CachedResourceRequestInitiators& cachedResourceRequestInitiators()
 {
     return threadGlobalData().cachedResourceRequestInitiators();
 }
 
 } // namespace WebCore
 
 #endif