Remove X-Retry-After support.

net/url_request/url_request_throttler_entry.h

 // Copyright (c) 2011 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_THROTTLER_ENTRY_H_
 #define NET_URL_REQUEST_URL_REQUEST_THROTTLER_ENTRY_H_
 #pragma once
 
 #include <queue>
 #include <string>
@@ skipping 40 matching lines @@
   // Fuzzing percentage. ex: 10% will spread requests randomly
   // between 90%-100% of the calculated time.
   static const double kDefaultJitterFactor;
 
   // Maximum amount of time we are willing to delay our request.
   static const int kDefaultMaximumBackoffMs;
 
   // Time after which the entry is considered outdated.
   static const int kDefaultEntryLifetimeMs;
 
-  // Name of the header that servers can use to ask clients to delay their
-  // next request.
-  static const char kRetryHeaderName[];
-
   // Name of the header that sites can use to opt out of exponential back-off
   // throttling.
   static const char kExponentialThrottlingHeader[];
 
   // Value for exponential throttling header that can be used to opt out of
   // exponential back-off throttling.
   static const char kExponentialThrottlingDisableValue[];
 
   // The manager object's lifetime must enclose the lifetime of this object.
   URLRequestThrottlerEntry(URLRequestThrottlerManager* manager,
@@ skipping 36 matching lines @@
 
   void Initialize();
 
   // Returns true if the given response code is considered an error for
   // throttling purposes.
   bool IsConsideredError(int response_code);
 
   // Equivalent to TimeTicks::Now(), virtual to be mockable for testing purpose.
   virtual base::TimeTicks ImplGetTimeNow() const;
 
-  // Used internally to increase release time following a retry-after header.
-  void HandleCustomRetryAfter(const std::string& header_value);
-
   // Used internally to handle the opt-out header.
   void HandleThrottlingHeader(const std::string& header_value,
                               const std::string& host);
 
   // Used internally to keep track of failure->success transitions and
   // generate statistics about them.
   void HandleMetricsTracking(int response_code);
 
   // Retrieves the back-off entry object we're using. Used to enable a
   // unit testing seam for dependency injection in tests.
@@ skipping 53 matching lines @@
   std::string url_id_;
 
   BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestThrottlerEntry);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_THROTTLER_ENTRY_H_