media: Send chrome-cache: frfr on first request.

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc

 // Copyright 2014 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 "components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h"
 
 #include <algorithm>
 #include <limits>
 #include <utility>
 
@@ skipping 274 matching lines @@
   // Reset |request|'s DataReductionProxyData.
   DataReductionProxyData::ClearData(request);
 
   if (params::IsIncludedInHoldbackFieldTrial()) {
     if (!WasEligibleWithoutHoldback(*request, proxy_info, proxy_retry_info))
       return;
     // For the holdback field trial, still log UMA as if the proxy was used.
     data = DataReductionProxyData::GetDataAndCreateIfNecessary(request);
     if (data)
       data->set_used_data_reduction_proxy(true);
+
+    headers->RemoveHeader(chrome_proxy_header());
     VerifyHttpRequestHeaders(false, *headers);
     return;
   }
 
   bool using_data_reduction_proxy = true;
   // The following checks rule out direct, invalid, and other connection types.
   if (!proxy_info.is_http() && !proxy_info.is_https() &&
       !proxy_info.is_quic()) {
     using_data_reduction_proxy = false;
   } else if (proxy_info.proxy_server().host_port_pair().IsEmpty()) {
     using_data_reduction_proxy = false;
   } else if (!data_reduction_proxy_config_->IsDataReductionProxy(
                  proxy_info.proxy_server(), nullptr)) {
     using_data_reduction_proxy = false;
   }
 
   LoFiDecider* lofi_decider = nullptr;
   if (data_reduction_proxy_io_data_)
     lofi_decider = data_reduction_proxy_io_data_->lofi_decider();
 
   if (!using_data_reduction_proxy) {
     if (lofi_decider) {
       // If not using the data reduction proxy, strip the
       // Chrome-Proxy-Accept-Transform header.
       lofi_decider->RemoveAcceptTransformHeader(headers);
     }
     RemoveChromeProxyECTHeader(headers);
+    headers->RemoveHeader(chrome_proxy_header());
     VerifyHttpRequestHeaders(false, *headers);
     return;
   }
 
   // Retrieves DataReductionProxyData from a request, creating a new instance
   // if needed.
   data = DataReductionProxyData::GetDataAndCreateIfNecessary(request);
   if (data) {
     data->set_used_data_reduction_proxy(true);
     // Only set GURL, NQE and session key string for main frame requests since
@@ skipping 357 matching lines @@
 }
 
 void DataReductionProxyNetworkDelegate::RemoveChromeProxyECTHeader(
     net::HttpRequestHeaders* request_headers) const {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   request_headers->RemoveHeader(chrome_proxy_ect_header());
 }
 
 }  // namespace data_reduction_proxy