Add test CallPerfTest.PlaysOutAudioAndVideoInSyncWithoutClockDrift

It's useful to have one test without clock drift, to distinguish
between errors breaking handling of drift, and errors breaking A/V sync
generally.

Bug: None
Change-Id: Ibc1bdab142ef37cb37171b51c00c556907a5ba6e
Reviewed-on: https://webrtc-review.googlesource.com/93283
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24239}
diff --git a/call/call_perf_tests.cc b/call/call_perf_tests.cc
index 55a5a1f..54e01b1 100644
--- a/call/call_perf_tests.cc
+++ b/call/call_perf_tests.cc
@@ -296,6 +296,12 @@
   }
 }
 
+TEST_F(CallPerfTest, PlaysOutAudioAndVideoInSyncWithoutClockDrift) {
+  TestAudioVideoSync(FecMode::kOff, CreateOrder::kAudioFirst,
+                     DriftingClock::kNoDrift, DriftingClock::kNoDrift,
+                     DriftingClock::kNoDrift, "_video_no_drift");
+}
+
 TEST_F(CallPerfTest, PlaysOutAudioAndVideoInSyncWithVideoNtpDrift) {
   TestAudioVideoSync(FecMode::kOff, CreateOrder::kAudioFirst,
                      DriftingClock::PercentsFaster(10.0f),