Add served cert chain to SSLInfo

net/http/http_response_info.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_RESPONSE_INFO_H_
 #define NET_HTTP_HTTP_RESPONSE_INFO_H_
 
 #include <string>
 
 #include "base/time/time.h"
@@ skipping 121 matching lines @@
   // If the response headers indicate a 401 or 407 failure, then this structure
   // will contain additional information about the authentication challenge.
   scoped_refptr<AuthChallengeInfo> auth_challenge;
 
   // The SSL client certificate request info.
   // TODO(wtc): does this really belong in HttpResponseInfo?  I put it here
   // because it is similar to |auth_challenge|, but unlike HTTP authentication
   // challenge, client certificate request is not part of an HTTP response.
   scoped_refptr<SSLCertRequestInfo> cert_request_info;
 
-  // The SSL connection info (if HTTPS).
+  // The SSL connection info (if HTTPS). Note that when a response is
+  // served from cache, not every field is present. See
+  // HttpResponseInfo::InitFromPickle().
   SSLInfo ssl_info;
 
   // The parsed response headers and status line.
   scoped_refptr<HttpResponseHeaders> headers;
 
   // The "Vary" header data for this response.
   HttpVaryData vary_data;
 
   // Any metadata asociated with this resource's cached data.
   scoped_refptr<IOBufferWithSize> metadata;
 
   static ConnectionInfo ConnectionInfoFromNextProto(NextProto next_proto);
 
   static std::string ConnectionInfoToString(ConnectionInfo connection_info);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_RESPONSE_INFO_H_