Modify data_reduction_proxy_header to support tamper detection logic.

chrome/renderer/page_load_histograms.cc

 // 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.
 
 #include "chrome/renderer/page_load_histograms.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 159 matching lines @@
   std::string via_header =
       base::UTF16ToUTF8(frame->dataSource()->response().httpHeaderField("Via"));
 
   if (via_header.empty())
     return false;
   std::string headers = "HTTP/1.1 200 OK\nVia: " + via_header + "\n\n";
   // Produce raw headers, expected by the |HttpResponseHeaders| constructor.
   std::replace(headers.begin(), headers.end(), '\n', '\0');
   scoped_refptr<net::HttpResponseHeaders> response_headers(
       new net::HttpResponseHeaders(headers));
-  return data_reduction_proxy::HasDataReductionProxyViaHeader(response_headers);
+  return data_reduction_proxy::HasDataReductionProxyViaHeader(
+      response_headers, NULL);
 }
 
 // Returns true if the provided URL is a referrer string that came from
 // a Google Web Search results page. This is a little non-deterministic
 // because desktop and mobile websearch differ and sometimes just provide
 // http://www.google.com/ as the referrer. In the case of /url we can be sure
 // that it came from websearch but we will be generous and allow for cases
 // where a non-Google URL was provided a bare Google URL as a referrer.
 // The domain validation matches the code used by the prerenderer for similar
 // purposes.
@@ skipping 565 matching lines @@
 
   DCHECK(document_state);
   DCHECK(ds);
   GURL url(ds->request().url());
   Time start = document_state->start_load_time();
   Time finish = document_state->finish_load_time();
   // TODO(mbelshe): should we log more stats?
   VLOG(1) << "PLT: " << (finish - start).InMilliseconds() << "ms "
           << url.spec();
 }