Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory.

net/tools/quic/quic_client.cc

Index: net/tools/quic/quic_client.cc
diff --git a/net/tools/quic/quic_client.cc b/net/tools/quic/quic_client.cc
index 15f6f5ce0f737d06bd67f8fefc1da0fe1da59479..7b8723faebc1d0c2686f7abc8bf521dce7556ec2 100644
--- a/net/tools/quic/quic_client.cc
+++ b/net/tools/quic/quic_client.cc
@@ -68,6 +68,7 @@ QuicClient::QuicClient(IPEndPoint server_address,
           supported_versions,
           config,
           new QuicEpollConnectionHelper(epoll_server, QuicAllocator::SIMPLE),
+          new QuicEpollAlarmFactory(epoll_server),
           proof_verifier),
       server_address_(server_address),
       local_port_(0),
@@ -230,7 +231,7 @@ void QuicClient::StartConnect() {
   }
 
   CreateQuicClientSession(new QuicConnection(
-      GetNextConnectionId(), server_address_, helper(), writer,
+      GetNextConnectionId(), server_address_, helper(), alarm_factory(), writer,
       /* owns_writer= */ false, Perspective::IS_CLIENT, supported_versions()));
 
   // Reset |writer_| after |session()| so that the old writer outlives the old