Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory. No behavior change,…

net/quic/quic_stream_factory.cc

Index: net/quic/quic_stream_factory.cc
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index ba1750e7fffb2c610b48f4cb855848a34047451e..0b922fdbca6809dbfa0ec9cd62e607440a72b523 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -40,6 +40,7 @@
 #include "net/quic/crypto/quic_random.h"
 #include "net/quic/crypto/quic_server_info.h"
 #include "net/quic/port_suggester.h"
+#include "net/quic/quic_chromium_alarm_factory.h"
 #include "net/quic/quic_chromium_client_session.h"
 #include "net/quic/quic_chromium_connection_helper.h"
 #include "net/quic/quic_chromium_packet_reader.h"
@@ -1547,15 +1548,19 @@ int QuicStreamFactory::CreateSession(
 
   if (!helper_.get()) {
     helper_.reset(new QuicChromiumConnectionHelper(
-        base::ThreadTaskRunnerHandle::Get().get(), clock_.get(),
-        random_generator_));
+        clock_.get(), random_generator_));
+  }
+
+  if (!alarm_factory_.get()) {
+    alarm_factory_.reset(new QuicChromiumAlarmFactory(
+        base::ThreadTaskRunnerHandle::Get().get(), clock_.get()));
   }
   QuicConnectionId connection_id = random_generator_->RandUint64();
   InitializeCachedStateInCryptoConfig(server_id, server_info, &connection_id);
 
   QuicChromiumPacketWriter* writer = new QuicChromiumPacketWriter(socket.get());
   QuicConnection* connection = new QuicConnection(
-      connection_id, addr, helper_.get(), writer, true /* owns_writer */,
+      connection_id, addr, helper_.get(), alarm_factory_.get(), writer, true /* owns_writer */,
       Perspective::IS_CLIENT, supported_versions_);
   writer->SetConnection(connection);
   connection->SetMaxPacketLength(max_packet_length_);