Support for new data reduction proxy via header

chrome/browser/net/spdyproxy/data_reduction_proxy_settings.cc

 // Copyright 2013 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 "chrome/browser/net/spdyproxy/data_reduction_proxy_settings.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
@@ skipping 190 matching lines @@
 
 // static
 bool DataReductionProxySettings::IsPreconnectHintingAllowed() {
   if (!IsDataReductionProxyAllowed())
     return false;
   return FieldTrialList::FindFullName("DataCompressionProxyPreconnectHints") ==
       kEnabled;
 }
 
 // static
-bool DataReductionProxySettings::WasFetchedViaProxy(
-    const net::HttpResponseHeaders* headers) {
-  const char kChromeProxyViaValue[] = "1.1 Chrome Compression Proxy";
-  void* iter = NULL;
-  std::string value;
-  while (headers->EnumerateHeader(&iter, "via", &value))
-    if (value == kChromeProxyViaValue) return true;
-  return false;
-}
-
-// static
 std::string DataReductionProxySettings::GetDataReductionProxyOrigin() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kSpdyProxyDevAuthOrigin))
     return command_line.GetSwitchValueASCII(switches::kSpdyProxyDevAuthOrigin);
   if (command_line.HasSwitch(switches::kSpdyProxyAuthOrigin))
     return command_line.GetSwitchValueASCII(switches::kSpdyProxyAuthOrigin);
 #if defined(DATA_REDUCTION_DEV_HOST)
   if (FieldTrialList::FindFullName("DataCompressionProxyDevRollout") ==
       kEnabled) {
     return DATA_REDUCTION_DEV_HOST;
@@ skipping 435 matching lines @@
 }
 
 void
 DataReductionProxySettings::ProbeWhetherDataReductionProxyIsAvailable() {
   net::URLFetcher* fetcher = GetURLFetcher();
   if (!fetcher)
     return;
   fetcher_.reset(fetcher);
   fetcher_->Start();
 }