media config: expand is_encrypted to a struct.

chromecast/media/audio/cast_audio_output_stream_unittest.cc

Index: chromecast/media/audio/cast_audio_output_stream_unittest.cc
diff --git a/chromecast/media/audio/cast_audio_output_stream_unittest.cc b/chromecast/media/audio/cast_audio_output_stream_unittest.cc
index a8ad0f0c0bed65cebd047b04c04e9b94c7d69c65..983028167775e0b8188b061d7a5b86d65b5fc164 100644
--- a/chromecast/media/audio/cast_audio_output_stream_unittest.cc
+++ b/chromecast/media/audio/cast_audio_output_stream_unittest.cc
@@ -385,7 +385,8 @@ TEST_F(CastAudioOutputStreamTest, Format) {
     const AudioConfig& audio_config = audio_decoder->config();
     EXPECT_EQ(kCodecPCM, audio_config.codec);
     EXPECT_EQ(kSampleFormatS16, audio_config.sample_format);
-    EXPECT_FALSE(audio_config.is_encrypted);
+    EXPECT_EQ(audio_config.encryption_scheme.mode,

[ddorwin, 2016/03/01 02:17:41]

Add checks for is_encrypted() and pattern().

[dougsteed, 2016/03/02 18:07:52]

I added inline is_encrypted() check to the chromecast EncryptionScheme struct,
which is being used here. It is essentially equivalent to the check for
kCipherModeNone. And that is the only one that needs to be checked. Pattern is
undefined if !is_encrypted().

+              EncryptionScheme::kCipherModeNone);
 
     CloseStream(stream);
   }