Adding CHECK(false) for case when input audio fails to start on Mac

media/audio/mac/audio_low_latency_input_mac.cc

Index: media/audio/mac/audio_low_latency_input_mac.cc
diff --git a/media/audio/mac/audio_low_latency_input_mac.cc b/media/audio/mac/audio_low_latency_input_mac.cc
index a50acf99a0196483eb4569e502cd21f97ae94217..22a0455e313277bc31b9f396a6e0fa7d53f5a059 100644
--- a/media/audio/mac/audio_low_latency_input_mac.cc
+++ b/media/audio/mac/audio_low_latency_input_mac.cc
@@ -769,6 +769,11 @@ void AUAudioInputStream::CheckInputStartupSuccess() {
       // Now when we know that startup has failed for some reason, add extra
       // UMA stats in an attempt to figure out the exact reason.
       AddHistogramsForFailedStartup();
+      // Kill the browser and create a crash log. This is just a temporary
+      // test (intended for Canary) where the goal is to gather some more
+      // detailed stats about how and why we can hit this problem.
+      // See crbug.com/549021 for details.
+      CHECK(false);
     }
   }
 }