Explicitly specifies nice mocks in OgHttp2AdapterTest.ClientServerInteractionTest.

Nice mocks are apparently not the default in open source gunit.

PiperOrigin-RevId: 443210787

quiche/http2/adapter/oghttp2_adapter_test.cc

diff --git a/quiche/http2/adapter/oghttp2_adapter_test.cc b/quiche/http2/adapter/oghttp2_adapter_test.cc
index 4e7e1af..81a923b 100644
--- a/quiche/http2/adapter/oghttp2_adapter_test.cc
+++ b/quiche/http2/adapter/oghttp2_adapter_test.cc
@@ -5722,11 +5722,11 @@
 // Exercises a naive mutually recursive test client and server. This test fails
 // without recursion guards in OgHttp2Session.
 TEST(OgHttp2AdapterInteractionTest, ClientServerInteractionTest) {
-  MockHttp2Visitor client_visitor;
+  testing::NiceMock<MockHttp2Visitor> client_visitor;
   OgHttp2Adapter::Options client_options;
   client_options.perspective = Perspective::kClient;
   auto client_adapter = OgHttp2Adapter::Create(client_visitor, client_options);
-  MockHttp2Visitor server_visitor;
+  testing::NiceMock<MockHttp2Visitor> server_visitor;
   OgHttp2Adapter::Options server_options;
   server_options.perspective = Perspective::kServer;
   auto server_adapter = OgHttp2Adapter::Create(server_visitor, server_options);