Make URLRequestThrottlerManager a member of URLRequestContext.

net/url_request/url_request_http_job.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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 100 matching lines @@
   CompletionCallback start_callback_;
   CompletionCallback notify_before_headers_sent_callback_;
 
   bool read_in_progress_;
 
   // An URL for an SDCH dictionary as suggested in a Get-Dictionary HTTP header.
   GURL sdch_dictionary_url_;
 
   scoped_ptr<HttpTransaction> transaction_;
 
-  // This is used to supervise traffic and enforce exponential back-off.
+  // This is used to supervise traffic and enforce exponential
+  // back-off.  May be NULL.
   scoped_refptr<URLRequestThrottlerEntryInterface> throttling_entry_;
 
   // Indicated if an SDCH dictionary was advertised, and hence an SDCH
   // compressed response is expected.  We use this to help detect (accidental?)
   // proxy corruption of a response, which sometimes marks SDCH content as
   // having no content encoding <oops>.
   bool sdch_dictionary_advertised_;
 
   // For SDCH latency experiments, when we are able to do SDCH, we may enable
   // either an SDCH latency test xor a pass through test.  The following bools
@@ skipping 98 matching lines @@
   // NetworkDelegate::NotifyURLRequestDestroyed has not been called, yet,
   // to inform the NetworkDelegate that it may not call back.
   bool awaiting_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestHttpJob);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_