QUIC - Collect performance stats for QUIC vs non-QUIC when google

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 41 matching lines @@
   // that would prevent us from doing a bunch of forward declaration.
 
   // Initializes from the representation stored in the given pickle.
   bool InitFromPickle(const Pickle& pickle, bool* response_truncated);
 
   // Call this method to persist the response info.
   void Persist(Pickle* pickle,
                bool skip_transient_headers,
                bool response_truncated) const;
 
+  // Whether QUIC is used or not.
+  bool DidUseQuic() const {
+    return connection_info == CONNECTION_INFO_QUIC1_SPDY3;
+  }
+
   // The following is only defined if the request_time member is set.
   // If this resource was found in the cache, then this bool is set, and
   // request_time may corresponds to a time "far" in the past.  Note that
   // stale content (perhaps un-cacheable) may be fetched from cache subject to
   // the load flags specified on the request info.  For example, this is done
   // when a user presses the back button to re-render pages, or at startup,
   // when reloading previously visited pages (without going over the network).
   // Note also that under normal circumstances, was_cached is set to the correct
   // value even if the request fails.
   bool was_cached;
@@ skipping 73 matching lines @@
   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_