Break reliance of QuicDispatcher on QuicServerSessionBase

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 ff6465ce3c05e6b0fd09cc1e997ec68ba60caa9e..dedfd3fe2889561f17cff692ebb895883c66382c 100644
--- a/net/tools/quic/end_to_end_test.cc
+++ b/net/tools/quic/end_to_end_test.cc
@@ -1818,8 +1818,8 @@ TEST_P(EndToEndTest, FlowControlsSynced) {
   QuicSpdySession* const client_session = client_->client()->session();
   QuicDispatcher* dispatcher =
       QuicServerPeer::GetDispatcher(server_thread_->server());
-  QuicSpdySession* server_session =
-      dispatcher->session_map().begin()->second.get();
+  auto server_session = static_cast<QuicSpdySession*>(
+      dispatcher->session_map().begin()->second.get());
 
   ExpectFlowControlsSynced(client_session->flow_controller(),
                            server_session->flow_controller());
@@ -2460,7 +2460,7 @@ TEST_P(EndToEndTest, EarlyResponseFinRecording) {
       QuicDispatcherPeer::session_map(dispatcher);
   QuicDispatcher::SessionMap::const_iterator it = map.begin();
   EXPECT_TRUE(it != map.end());
-  QuicServerSessionBase* server_session = it->second.get();
+  QuicSession* server_session = it->second.get();
 
   // The stream is not waiting for the arrival of the peer's final offset.
   EXPECT_EQ(