Implement URLRequestBackoffManager for managing Backoff headers

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_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "net/base/auth.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/base/sdch_manager.h"
 #include "net/cookies/cookie_store.h"
 #include "net/filter/filter.h"
 #include "net/http/http_request_info.h"
 #include "net/socket/connection_attempts.h"
+#include "net/url_request/url_request_backoff_manager.h"
 #include "net/url_request/url_request_job.h"
 #include "net/url_request/url_request_throttler_entry_interface.h"
 
 namespace net {
 
 class HttpRequestHeaders;
 class HttpResponseHeaders;
 class HttpResponseInfo;
 class HttpTransaction;
 class HttpUserAgentSettings;
@@ skipping 29 matching lines @@
  private:
   enum CompletionCause {
     ABORTED,
     FINISHED
   };
 
   typedef base::RefCountedData<bool> SharedBoolean;
 
   class HttpFilterContext;
 
+  // Shadows URLRequestJob's version of this method.
+  void NotifyBeforeNetworkStart(bool* defer);
+
   // Shadows URLRequestJob's version of this method so we can grab cookies.
   void NotifyHeadersComplete();
 
   // Shadows URLRequestJob's method so we can record histograms.
   void NotifyDone(const URLRequestStatus& status);
 
   void DestroyTransaction();
 
   void AddExtraHeaders();
   void AddCookieHeaderAndStart();
   void SaveCookiesAndNotifyHeadersComplete(int result);
   void SaveNextCookie();
   void FetchResponseCookies(std::vector<std::string>* cookies);
 
+  // Processes a Backoff header, if one exists.
+  void ProcessBackoffHeader();
+
   // Processes the Strict-Transport-Security header, if one exists.
   void ProcessStrictTransportSecurityHeader();
 
   // Processes the Public-Key-Pins header, if one exists.
   void ProcessPublicKeyPinsHeader();
 
   // |result| should be OK, or the request is canceled.
   void OnHeadersReceivedCallback(int result);
   void OnStartCompleted(int result);
   void OnReadCompleted(int result);
@@ skipping 162 matching lines @@
 
   // Flag used to verify that |this| is not deleted while we are awaiting
   // a callback from the NetworkDelegate. Used as a fail-fast mechanism.
   // True if we are waiting a callback and
   // NetworkDelegate::NotifyURLRequestDestroyed has not been called, yet,
   // to inform the NetworkDelegate that it may not call back.
   bool awaiting_callback_;
 
   const HttpUserAgentSettings* http_user_agent_settings_;
 
+  URLRequestBackoffManager* backoff_manager_;
+
   base::WeakPtrFactory<URLRequestHttpJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestHttpJob);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_