Merge GetOrCreateDynamicStream() into GetOrCreateStream().

GetOrCreateDynamicStream() no longer guarantees that the returned stream is non-static. And since we have a single stream map for all streams, we can just have one method.

gfe-relnote: Protected by quic_inline_getorcreatedynamicstream.
PiperOrigin-RevId: 258426677
Change-Id: I89ac704a44da79afce3c1704efd5d721c9585f32
diff --git a/quic/tools/quic_simple_server_session_test.cc b/quic/tools/quic_simple_server_session_test.cc
index eeb9ce3..9bc3573 100644
--- a/quic/tools/quic_simple_server_session_test.cc
+++ b/quic/tools/quic_simple_server_session_test.cc
@@ -522,12 +522,12 @@
 }
 
 TEST_P(QuicSimpleServerSessionTest, GetEvenIncomingError) {
-  // Tests that calling GetOrCreateDynamicStream() on an outgoing stream not
+  // Tests that calling GetOrCreateStream() on an outgoing stream not
   // promised yet should result close connection.
   EXPECT_CALL(*connection_, CloseConnection(QUIC_INVALID_STREAM_ID,
                                             "Data for nonexistent stream", _));
   EXPECT_EQ(nullptr,
-            QuicSessionPeer::GetOrCreateDynamicStream(
+            QuicSessionPeer::GetOrCreateStream(
                 session_.get(), GetNthServerInitiatedUnidirectionalId(1)));
 }