blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/core/fetch/CrossOriginAccessControl.h

 /*
  * Copyright (C) 2008 Apple 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 21 matching lines @@
 #include "platform/network/ResourceRequest.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 using HTTPHeaderSet = HashSet<String, CaseFoldingHash>;
 
-class Resource;
 struct ResourceLoaderOptions;
 class ResourceRequest;
 class ResourceResponse;
 class SecurityOrigin;
 
 class CrossOriginAccessControl {
   STATIC_ONLY(CrossOriginAccessControl);
 
  public:
   // Given the new request URL, returns true if
@@ skipping 25 matching lines @@
                                   String& errorDescription);
 CORE_EXPORT void parseAccessControlExposeHeadersAllowList(
     const String& headerValue,
     HTTPHeaderSet&);
 CORE_EXPORT void extractCorsExposedHeaderNamesList(const ResourceResponse&,
                                                    HTTPHeaderSet&);
 
 }  // namespace blink
 
 #endif  // CrossOriginAccessControl_h