Adds dynamic FEC on/off switch in packet creator. Tightens use of

net/tools/quic/end_to_end_test.cc

Index: net/tools/quic/end_to_end_test.cc
diff --git a/net/tools/quic/end_to_end_test.cc b/net/tools/quic/end_to_end_test.cc
index cf568268a4e4a2af5eea9fb24894679fb71e0391..8d045350dc77304915a2ecf6efb6aacc94c5d658 100644
--- a/net/tools/quic/end_to_end_test.cc
+++ b/net/tools/quic/end_to_end_test.cc
@@ -24,6 +24,7 @@
 #include "net/quic/quic_sent_packet_manager.h"
 #include "net/quic/quic_server_id.h"
 #include "net/quic/test_tools/quic_connection_peer.h"
+#include "net/quic/test_tools/quic_packet_creator_peer.h"
 #include "net/quic/test_tools/quic_session_peer.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/quic/test_tools/reliable_quic_stream_peer.h"
@@ -50,6 +51,7 @@ using base::WaitableEvent;
 using net::EpollServer;
 using net::test::GenerateBody;
 using net::test::QuicConnectionPeer;
+using net::test::QuicPacketCreatorPeer;
 using net::test::QuicSessionPeer;
 using net::test::ReliableQuicStreamPeer;
 using net::tools::test::PacketDroppingTestWriter;
@@ -644,7 +646,10 @@ TEST_P(EndToEndTest, LargePostFEC) {
   client_->client()->WaitForCryptoHandshakeConfirmed();
   SetPacketLossPercentage(30);
 
-  client_->options()->max_packets_per_fec_group = 6;
+  // Turn on FEC protection.
+  QuicPacketCreator* creator = QuicConnectionPeer::GetPacketCreator(
+      client_->client()->session()->connection());
+  EXPECT_TRUE(QuicPacketCreatorPeer::SwitchFecProtectionOn(creator, 6));
 
   string body;
   GenerateBody(&body, 10240);