Remove stale-while-revalidate from net

net/http/http_cache_transaction.h

 // Copyright (c) 2012 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.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 
@@ skipping 320 matching lines @@
 
   // Called to restart a network transaction with a client certificate.
   // Returns network error code.
   int RestartNetworkRequestWithCertificate(X509Certificate* client_cert,
                                            SSLPrivateKey* client_private_key);
 
   // Called to restart a network transaction with authentication credentials.
   // Returns network error code.
   int RestartNetworkRequestWithAuth(const AuthCredentials& credentials);
 
-  // Called to determine if we need to validate the cache entry before using it,
-  // and whether the validation should be synchronous or asynchronous.
-  ValidationType RequiresValidation();
+  // Called to determine if we need to validate the cache entry before using it.
+  bool RequiresValidation();
 
   // Called to make the request conditional (to ask the server if the cached
   // copy is valid).  Returns true if able to make the request conditional.
   bool ConditionalizeRequest();
 
   // Makes sure that a 206 response is expected.  Returns true on success.
   // On success, handling_206_ will be set to true if we are processing a
   // partial entry.
   bool ValidatePartialResponse();
 
@@ skipping 162 matching lines @@
   bool in_do_loop_;
 
   base::WeakPtrFactory<Transaction> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Transaction);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_