[Cronet] Expose quic_user_agent_id and quic_prefer_aes config options.

components/cronet/url_request_context_config.cc

Index: components/cronet/url_request_context_config.cc
diff --git a/components/cronet/url_request_context_config.cc b/components/cronet/url_request_context_config.cc
index ca88279edc21a7a24a9d51353dc40122be977b2c..f520220acbc635a9980c43664fd4a9e0625f2719 100644
--- a/components/cronet/url_request_context_config.cc
+++ b/components/cronet/url_request_context_config.cc
@@ -38,6 +38,7 @@ const char kQuicPacketLossThreshold[] = "packet_loss_threshold";
 const char kQuicIdleConnectionTimeoutSeconds[] =
     "idle_connection_timeout_seconds";
 const char kQuicHostWhitelist[] = "host_whitelist";
+const char kQuicPreferAes[] = "prefer_aes";
 
 // AsyncDNS experiment dictionary name.
 const char kAsyncDnsFieldTrialName[] = "AsyncDNS";
@@ -131,6 +132,11 @@ void ParseAndSetExperimentalOptions(
       }
       context_builder->set_quic_host_whitelist(hosts);
     }
+
+    bool quic_prefer_aes = false;
+    if (quic_args->GetBoolean(kQuicPreferAes, &quic_prefer_aes)) {
+      context_builder->set_quic_prefer_aes(quic_prefer_aes);
+    }
   }
 
   const base::DictionaryValue* async_dns_args = nullptr;
@@ -170,6 +176,7 @@ URLRequestContextConfig::Pkp::~Pkp() {}
 
 URLRequestContextConfig::URLRequestContextConfig(
     bool enable_quic,
+    const std::string& quic_user_agent_id,
     bool enable_spdy,
     bool enable_sdch,
     HttpCacheType http_cache,
@@ -184,6 +191,7 @@ URLRequestContextConfig::URLRequestContextConfig(
     const std::string& data_reduction_secure_proxy_check_url,
     scoped_ptr<net::CertVerifier> mock_cert_verifier)
     : enable_quic(enable_quic),
+      quic_user_agent_id(quic_user_agent_id),
       enable_spdy(enable_spdy),
       enable_sdch(enable_sdch),
       http_cache(http_cache),
@@ -222,6 +230,7 @@ void URLRequestContextConfig::ConfigureURLRequestContextBuilder(
   context_builder->set_user_agent(user_agent);
   context_builder->SetSpdyAndQuicEnabled(enable_spdy, enable_quic);
   context_builder->set_sdch_enabled(enable_sdch);
+  context_builder->set_quic_user_agent_id(quic_user_agent_id);
 
   ParseAndSetExperimentalOptions(experimental_options, context_builder,
                                  net_log);