Remove unused return value for QuicSession::OnStopSendingFrame().

gfe-relnote: protected by disabled v99 flag.
PiperOrigin-RevId: 277115916
Change-Id: I15b4a9ce1b5316d723e097f6aa8d590b2955e4e0
diff --git a/quic/test_tools/quic_test_utils.h b/quic/test_tools/quic_test_utils.h
index e39b416..1bcfa6a 100644
--- a/quic/test_tools/quic_test_utils.h
+++ b/quic/test_tools/quic_test_utils.h
@@ -412,7 +412,7 @@
   MOCK_METHOD1(OnMaxStreamsFrame, bool(const QuicMaxStreamsFrame& frame));
   MOCK_METHOD1(OnStreamsBlockedFrame,
                bool(const QuicStreamsBlockedFrame& frame));
-  MOCK_METHOD1(OnStopSendingFrame, bool(const QuicStopSendingFrame& frame));
+  MOCK_METHOD1(OnStopSendingFrame, void(const QuicStopSendingFrame& frame));
 };
 
 class MockQuicConnectionHelper : public QuicConnectionHelperInterface {
diff --git a/quic/test_tools/simulator/quic_endpoint.h b/quic/test_tools/simulator/quic_endpoint.h
index 0b9b54a..d1291f8 100644
--- a/quic/test_tools/simulator/quic_endpoint.h
+++ b/quic/test_tools/simulator/quic_endpoint.h
@@ -81,9 +81,7 @@
       const QuicStreamsBlockedFrame& /*frame*/) override {
     return true;
   }
-  bool OnStopSendingFrame(const QuicStopSendingFrame& /*frame*/) override {
-    return true;
-  }
+  void OnStopSendingFrame(const QuicStopSendingFrame& /*frame*/) override {}
 
   // End QuicConnectionVisitorInterface implementation.