Pass chrome version and channel in CHLO message to server.

net/quic/crypto/quic_crypto_client_config.h

 // 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.
 
 #ifndef NET_QUIC_CRYPTO_QUIC_CRYPTO_CLIENT_CONFIG_H_
 #define NET_QUIC_CRYPTO_QUIC_CRYPTO_CLIENT_CONFIG_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 227 matching lines @@
   // Prefers AES-GCM (kAESG) over other AEAD algorithms. Call this method if
   // the CPU has hardware acceleration for AES-GCM. This method can only be
   // called after SetDefaults().
   void PreferAesGcm();
 
   // Disables the use of ECDSA for proof verification.
   // Call this method on platforms that do not support ECDSA.
   // TODO(rch): remove this method when we drop support for Windows XP.
   void DisableEcdsa();
 
+  // Saves the |user_agent_id| that will be passed in QUIC's CHLO message.
+  void set_user_agent_id(const std::string& user_agent_id) {
+    user_agent_id_ = user_agent_id;
+  }
+
  private:
   typedef std::map<QuicServerId, CachedState*> CachedStateMap;
 
   // If the suffix of the hostname in |server_id| is in |canoncial_suffixes_|,
   // then populate |cached| with the canonical cached state from
   // |canonical_server_map_| for that suffix.
   void PopulateFromCanonicalConfig(const QuicServerId& server_id,
                                    CachedState* cached);
 
   // cached_states_ maps from the server_id to the cached information about
   // that server.
   CachedStateMap cached_states_;
 
   // Contains a map of servers which could share the same server config. Map
   // from a canonical host suffix/port/scheme to a representative server with
   // the canonical suffix, which has a plausible set of initial certificates
   // (or at least server public key).
   std::map<QuicServerId, QuicServerId> canonical_server_map_;
 
   // Contains list of suffixes (for exmaple ".c.youtube.com",
   // ".googlevideo.com") of canoncial hostnames.
   std::vector<std::string> canoncial_suffixes_;
 
   scoped_ptr<ProofVerifier> proof_verifier_;
   scoped_ptr<ChannelIDSource> channel_id_source_;
 
   // True if ECDSA should be disabled.
   bool disable_ecdsa_;
 
+  // The |user_agent_id_| passed in QUIC's CHLO message.
+  std::string user_agent_id_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicCryptoClientConfig);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_QUIC_CRYPTO_CLIENT_CONFIG_H_