Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

third_party/WebKit/Source/core/loader/FrameFetchContext.cpp

 /*
  * Copyright (C) 2013 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 223 matching lines @@
                                                     FetchResourceType type) {
   bool isMainResource = type == FetchMainResource;
   if (!isMainResource) {
     if (!request.didSetHTTPReferrer()) {
       DCHECK(m_document);
       request.setHTTPReferrer(SecurityPolicy::generateReferrer(
           m_document->getReferrerPolicy(), request.url(),
           m_document->outgoingReferrer()));
       request.addHTTPOriginIfNeeded(m_document->getSecurityOrigin());
     } else {
-      CHECK_EQ(SecurityPolicy::generateReferrer(request.getReferrerPolicy(),
-                                                request.url(),
-                                                request.httpReferrer())
-                   .referrer,
-               request.httpReferrer());
+      DCHECK_EQ(SecurityPolicy::generateReferrer(request.getReferrerPolicy(),
+                                                 request.url(),
+                                                 request.httpReferrer())
+                    .referrer,
+                request.httpReferrer());
       request.addHTTPOriginIfNeeded(request.httpReferrer());
     }
   }
 
   if (m_document) {
     request.setExternalRequestStateFromRequestorAddressSpace(
         m_document->addressSpace());
   }
 
   // The remaining modifications are only necessary for HTTP and HTTPS.
@@ skipping 798 matching lines @@
                                                     response);
 }
 
 DEFINE_TRACE(FrameFetchContext) {
   visitor->trace(m_document);
   visitor->trace(m_documentLoader);
   FetchContext::trace(visitor);
 }
 
 }  // namespace blink