Bounce all requests off the cache lock after 25ms.

net/http/http_cache.cc

 // 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.
 
 #include "net/http/http_cache.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 291 matching lines @@
     : HttpCache(make_scoped_ptr(new HttpNetworkLayer(session)),
                 backend_factory.Pass(),
                 set_up_quic_server_info) {}
 
 HttpCache::HttpCache(scoped_ptr<HttpTransactionFactory> network_layer,
                      scoped_ptr<BackendFactory> backend_factory,
                      bool set_up_quic_server_info)
     : net_log_(nullptr),
       backend_factory_(backend_factory.Pass()),
       building_backend_(false),
-      bypass_lock_for_test_(false),
       fail_conditionalization_for_test_(false),
       mode_(NORMAL),
       network_layer_(network_layer.Pass()),
       clock_(new base::DefaultClock()),
       weak_factory_(this) {
   HttpNetworkSession* session = network_layer_->GetSession();
   // Session may be NULL in unittests.
   // TODO(mmenke): Seems like tests could be changed to provide a session,
   // rather than having logic only used in unit tests here.
   if (session) {
@@ skipping 129 matching lines @@
 int HttpCache::CreateTransaction(RequestPriority priority,
                                  scoped_ptr<HttpTransaction>* trans) {
   // Do lazy initialization of disk cache if needed.
   if (!disk_cache_.get()) {
     // We don't care about the result.
     CreateBackend(NULL, CompletionCallback());
   }
 
    HttpCache::Transaction* transaction =
       new HttpCache::Transaction(priority, this);
-   if (bypass_lock_for_test_)
-    transaction->BypassLockForTest();
    if (fail_conditionalization_for_test_)
      transaction->FailConditionalizationForTest();
 
   trans->reset(transaction);
   return OK;
 }
 
 HttpCache* HttpCache::GetCache() {
   return this;
 }
@@ skipping 688 matching lines @@
     building_backend_ = false;
     DeletePendingOp(pending_op);
   }
 
   // The cache may be gone when we return from the callback.
   if (!item->DoCallback(result, disk_cache_.get()))
     item->NotifyTransaction(result, NULL);
 }
 
 }  // namespace net