Support (E)AC3 passthrough

media/base/key_systems_unittest.cc

Index: media/base/key_systems_unittest.cc
diff --git a/media/base/key_systems_unittest.cc b/media/base/key_systems_unittest.cc
index 596cc9bf1449ff717b1b42213d3c596eb00e1604..1ec5748befd914bd92ebd861f51feadc6d47fa19 100644
--- a/media/base/key_systems_unittest.cc
+++ b/media/base/key_systems_unittest.cc
@@ -183,6 +183,7 @@ class TestMediaClient : public MediaClient {
   bool IsSupportedVideoConfig(media::VideoCodec codec,
                               media::VideoCodecProfile profile,
                               int level) final;
+  bool IsPassthroughAudioSupported(media::AudioCodec codec) final;
 
   // Helper function to test the case where IsKeySystemsUpdateNeeded() is true
   // after AddSupportedKeySystems() is called.
@@ -239,6 +240,10 @@ bool TestMediaClient::IsSupportedVideoConfig(media::VideoCodec codec,
   return true;
 }
 
+bool TestMediaClient::IsPassthroughAudioSupported(media::AudioCodec codec) {
+  return false;
+}
+
 void TestMediaClient::SetKeySystemsUpdateNeeded() {
   is_update_needed_ = true;
 }