Remove some calls to URLRequestContext::network_delegate().

net/url_request/url_request_throttler_entry.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/url_request/url_request_throttler_entry.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
@@ skipping 135 matching lines @@
 }
 
 void URLRequestThrottlerEntry::DetachManager() {
   manager_ = NULL;
 }
 
 bool URLRequestThrottlerEntry::ShouldRejectRequest(
     const URLRequest& request) const {
   bool reject_request = false;
   if (!is_backoff_disabled_ && !ExplicitUserRequest(request.load_flags()) &&
-      (!request.context()->network_delegate() ||
-       request.context()->network_delegate()->CanThrottleRequest(request)) &&
-      GetBackoffEntry()->ShouldRejectRequest()) {
+      request.CanThrottle() && GetBackoffEntry()->ShouldRejectRequest()) {

[erikwright (departed), 2013/02/25 15:07:23]

I don't think this is right. Either we can just not call into the throttling
system if the request is not eligible for throttling, or we should pass along
the network delegate during URLRequestThrottlerManager::RegisterRequestUrl

     int num_failures = GetBackoffEntry()->failure_count();
     int release_after_ms =
         GetBackoffEntry()->GetTimeUntilRelease().InMilliseconds();
 
     net_log_.AddEvent(
         NetLog::TYPE_THROTTLING_REJECTED_REQUEST,
         base::Bind(&NetLogRejectedRequestCallback,
                    &url_id_, num_failures, release_after_ms));
 
     reject_request = true;
@@ skipping 143 matching lines @@
 BackoffEntry* URLRequestThrottlerEntry::GetBackoffEntry() {
   return &backoff_entry_;
 }
 
 // static
 bool URLRequestThrottlerEntry::ExplicitUserRequest(const int load_flags) {
   return (load_flags & LOAD_MAYBE_USER_GESTURE) != 0;
 }
 
 }  // namespace net