Support for new data reduction proxy via header

net/http/http_response_headers.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_RESPONSE_HEADERS_H_
 #define NET_HTTP_HTTP_RESPONSE_HEADERS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 254 matching lines @@
     base::TimeDelta bypass_duration;
   };
 
   // Returns true if the Chrome-Proxy header is present and contains a bypass
   // delay. Sets |proxy_info->bypass_duration| to the specified delay if greater
   // than 0, and to 0 otherwise to indicate that the default proxy delay
   // (as specified in |ProxyList::UpdateRetryInfoOnFallback|) should be used.
   // If all available Chrome proxies should by bypassed, |bypass_all| is set to
   // true. |proxy_info| must be non-NULL.
   bool GetChromeProxyInfo(ChromeProxyInfo* proxy_info) const;
+
+  // Returns true if response headers contain the Chrome proxy Via header value.
+  bool IsChromeProxyResponse() const;
 #endif
 
   // Creates a Value for use with the NetLog containing the response headers.
   base::Value* NetLogCallback(NetLog::LogLevel log_level) const;
 
   // Takes in a Value created by the above function, and attempts to create a
   // copy of the original headers.  Returns true on success.  On failure,
   // clears |http_response_headers|.
   // TODO(mmenke):  Long term, we want to remove this, and migrate external
   //                consumers to be NetworkDelegates.
@@ skipping 114 matching lines @@
 
   // The parsed http version number (not normalized).
   HttpVersion parsed_http_version_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpResponseHeaders);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_RESPONSE_HEADERS_H_