Remove X-Retry-After support.

net/url_request/url_request_throttler_test_support.cc

 // 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.
 
 #include "net/url_request/url_request_throttler_test_support.h"
 
 #include "net/url_request/url_request_throttler_entry.h"
 
 namespace net {
 
@@ skipping 24 matching lines @@
     : fake_retry_value_(retry_value),
       fake_opt_out_value_(opt_out_value),
       fake_response_code_(response_code) {
 }
 
 MockURLRequestThrottlerHeaderAdapter::~MockURLRequestThrottlerHeaderAdapter() {
 }
 
 std::string MockURLRequestThrottlerHeaderAdapter::GetNormalizedValue(
     const std::string& key) const {
-  if (key == URLRequestThrottlerEntry::kRetryHeaderName &&
-      !fake_retry_value_.empty()) {
-    return fake_retry_value_;
-  }
-
   if (key ==
       URLRequestThrottlerEntry::kExponentialThrottlingHeader &&
       !fake_opt_out_value_.empty()) {
     return fake_opt_out_value_;
   }
 
   return "";
 }
 
 int MockURLRequestThrottlerHeaderAdapter::GetResponseCode() const {
   return fake_response_code_;
 }
 
 }  // namespace net