Add SetSupportsQuic method to explicitly specify server that supports QUIC.

components/cronet/android/url_request_context_adapter.cc

 // Copyright 2014 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.
 
 #include "components/cronet/android/url_request_context_adapter.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/single_thread_task_runner.h"
 #include "components/cronet/url_request_context_config.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log_logger.h"
 #include "net/cert/cert_verifier.h"
 #include "net/http/http_auth_handler_factory.h"
 #include "net/http/http_network_layer.h"
-#include "net/http/http_server_properties_impl.h"
+#include "net/http/http_server_properties.h"
 #include "net/proxy/proxy_config_service_fixed.h"
 #include "net/proxy/proxy_service.h"
 #include "net/ssl/ssl_config_service_defaults.h"
 #include "net/url_request/static_http_user_agent_settings.h"
 #include "net/url_request/url_request_context_builder.h"
 #include "net/url_request/url_request_context_storage.h"
 #include "net/url_request/url_request_job_factory_impl.h"
 
 namespace {
 
@@ skipping 110 matching lines @@
     scoped_ptr<URLRequestContextConfig> config) {
   // TODO(mmenke):  Add method to have the builder enable SPDY.
   net::URLRequestContextBuilder context_builder;
   context_builder.set_network_delegate(new BasicNetworkDelegate());
   context_builder.set_proxy_config_service(
       new net::ProxyConfigServiceFixed(net::ProxyConfig()));
   config->ConfigureURLRequestContextBuilder(&context_builder);
 
   context_.reset(context_builder.Build());
 
+  // Currently (circa M39) enabling QUIC requires setting probability threshold.
+  if (config->enable_quic) {
+    context_->http_server_properties()
+        ->SetAlternateProtocolProbabilityThreshold(1.0f);
+    for (size_t hint = 0; hint < config->quic_hints.size(); ++hint) {
+      const URLRequestContextConfig::QuicHint& quic_hint =
+          *config->quic_hints[hint];
+      net::HostPortPair quic_hint_host(quic_hint.host, quic_hint.port);

[mmenke, 2014/09/16 01:51:38]

optional nit:  Suggest calling this quic_hint_host_port_pair.  Wordier, but we
call them host_port_pair almost everywhere.

[mef, 2014/09/16 08:44:14]

Done.

+      if (quic_hint_host.IsEmpty()) {
+        LOG(ERROR) << "Invalid QUIC hint host: " << quic_hint.host;

[mmenke, 2014/09/16 01:51:38]

This line seems a bit silly, seeing as IsEmpty only returns true if both the
host is the empty string and the port is valid.

[mef, 2014/09/16 08:44:14]

Done.

+        continue;
+      }
+
+      if (quic_hint.alternate_port <= std::numeric_limits<uint16>::min() ||
+          quic_hint.alternate_port > std::numeric_limits<uint16>::max()) {
+        LOG(ERROR) << "Invalid QUIC hint alternate port: "
+                   << quic_hint.alternate_port;
+        continue;
+      }
+
+      context_->http_server_properties()->SetAlternateProtocol(
+          quic_hint_host,
+          static_cast<uint16>(quic_hint.alternate_port),
+          net::AlternateProtocol::QUIC,
+          1.0f);
+    }
+  }
+
   if (VLOG_IS_ON(2)) {
     net_log_observer_.reset(new NetLogObserver());
     context_->net_log()->AddThreadSafeObserver(net_log_observer_.get(),
                                                net::NetLog::LOG_ALL_BUT_BYTES);
   }
 
   delegate_->OnContextInitialized(this);
 }
 
 URLRequestContextAdapter::~URLRequestContextAdapter() {
@@ skipping 43 matching lines @@
     net_log_logger_.reset();
   }
 }
 
 void NetLogObserver::OnAddEntry(const net::NetLog::Entry& entry) {
   VLOG(2) << "Net log entry: type=" << entry.type()
           << ", source=" << entry.source().type << ", phase=" << entry.phase();
 }
 
 }  // namespace cronet