Give user the ability to disable the URL request throttler:...

net/url_request/url_request_http_job.cc

 // Copyright (c) 2010 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/url_request/url_request_http_job.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 678 matching lines @@
     rv = transaction_->RestartWithAuth(username_, password_, &start_callback_);
     username_.clear();
     password_.clear();
   } else {
     DCHECK(request_->context());
     DCHECK(request_->context()->http_transaction_factory());
 
     rv = request_->context()->http_transaction_factory()->CreateTransaction(
         &transaction_);
     if (rv == OK) {
-      if (!throttling_entry_->IsDuringExponentialBackoff()) {
+      if (!throttling_entry_->IsDuringExponentialBackoff() ||
+          !net::URLRequestThrottlerManager::GetInstance()->
+              enforce_throttling()) {
         rv = transaction_->Start(
             &request_info_, &start_callback_, request_->net_log());
       } else {
         // Special error code for the exponential back-off module.
         rv = ERR_TEMPORARILY_THROTTLED;
       }
       // Make sure the context is alive for the duration of the
       // transaction.
       context_ = request_->context();
     }
@@ skipping 248 matching lines @@
                                     include_subdomains,
                                     ctx->transport_security_state());
     if (!prober->ProbeHost(request_info_.url.host(), request()->context(),
                            delegate)) {
       delete delegate;
     }
   }
 }
 
 }  // namespace net