Exclude simple headers when building Access-Control-Request-Headers

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 39 matching lines @@
     // Given the new request URL, returns true if
     // - the URL has a CORS supported scheme and
     // - the URL does not contain the userinfo production.
     static bool isLegalRedirectLocation(const KURL&, String& errorDescription);
     static bool handleRedirect(SecurityOrigin*, ResourceRequest&, const ResourceResponse&, StoredCredentials, ResourceLoaderOptions&, String&);
 };
 
 CORE_EXPORT bool isOnAccessControlResponseHeaderWhitelist(const String&);
 
 void updateRequestForAccessControl(ResourceRequest&, SecurityOrigin*, StoredCredentials);
-ResourceRequest createAccessControlPreflightRequest(const ResourceRequest&, SecurityOrigin*);
+CORE_EXPORT ResourceRequest createAccessControlPreflightRequest(const ResourceRequest&, SecurityOrigin*);
 
 bool passesAccessControlCheck(const ResourceResponse&, StoredCredentials, SecurityOrigin*, String& errorDescription, WebURLRequest::RequestContext requestType);
 bool passesPreflightStatusCheck(const ResourceResponse&, String& errorDescription);
 CORE_EXPORT void parseAccessControlExposeHeadersAllowList(const String& headerValue, HTTPHeaderSet&);
 
 } // namespace blink
 
 #endif // CrossOriginAccessControl_h