Enable QUIC for proxies based on Finch config and command line switch.

net/url_request/url_request_context_builder.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.
 
 // This class is useful for building a simple URLRequestContext. Most creators
 // of new URLRequestContexts should use this helper class to construct it. Call
 // any configuration params, and when done, invoke Build() to construct the
 // URLRequestContext. This URLRequestContext will own all its own storage.
 //
 // URLRequestContextBuilder and its associated params classes are initially
@@ skipping 57 matching lines @@
 
     // These fields mirror those in net::HttpNetworkSession::Params;
     bool ignore_certificate_errors;
     HostMappingRules* host_mapping_rules;
     uint16 testing_fixed_http_port;
     uint16 testing_fixed_https_port;
     NextProtoVector next_protos;
     std::string trusted_spdy_proxy;
     bool use_alternate_protocols;
     bool enable_quic;
+    bool enable_quic_for_proxies;
     QuicTagVector quic_connection_options;
   };
 
   URLRequestContextBuilder();
   ~URLRequestContextBuilder();
 
   // These functions are mutually exclusive.  The ProxyConfigService, if
   // set, will be used to construct a ProxyService.
   void set_proxy_config_service(ProxyConfigService* proxy_config_service) {
     proxy_config_service_.reset(proxy_config_service);
@@ skipping 68 matching lines @@
       const HttpNetworkSessionParams& http_network_session_params) {
     http_network_session_params_ = http_network_session_params;
   }
 
   void set_transport_security_persister_path(
       const base::FilePath& transport_security_persister_path) {
     transport_security_persister_path_ = transport_security_persister_path;
   }
 
   // Adjust |http_network_session_params_.next_protos| to enable SPDY and QUIC.
   void SetSpdyAndQuicEnabled(bool spdy_enabled,

[Ryan Hamilton, 2015/02/11 00:20:32]

I don't see any changes to the caller of this method. Is that intentional?
Perhaps this method does not need to change if you (flywheel) don't need to call
it?

[tbansal1, 2015/02/11 01:25:26]

Done.

-                             bool quic_enabled);
+                             bool quic_enabled,
+                             bool quic_enabled_for_proxies);
 
   void set_quic_connection_options(
       const QuicTagVector& quic_connection_options) {
     http_network_session_params_.quic_connection_options =
         quic_connection_options;
   }
 
   void set_throttling_enabled(bool throttling_enabled) {
     throttling_enabled_ = throttling_enabled;
   }
@@ skipping 48 matching lines @@
   scoped_refptr<CookieStore> cookie_store_;
   scoped_ptr<FtpTransactionFactory> ftp_transaction_factory_;
   std::vector<SchemeFactory> extra_http_auth_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextBuilder);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_BUILDER_H_