[cast] AAC encoder for OS X and iOS based on AudioConverter and AudioFile

media/cast/sender/audio_encoder_unittest.cc

Index: media/cast/sender/audio_encoder_unittest.cc
diff --git a/media/cast/sender/audio_encoder_unittest.cc b/media/cast/sender/audio_encoder_unittest.cc
index 3868f0d477b44cdfd954f47e98b5422bd9eec958..795ab7259fe72142dedd6ac1807fabdb6f5914b5 100644
--- a/media/cast/sender/audio_encoder_unittest.cc
+++ b/media/cast/sender/audio_encoder_unittest.cc
@@ -183,6 +183,12 @@ TEST_P(AudioEncoderTest, EncodePcm16) {
   RunTestForCodec(CODEC_AUDIO_PCM16);
 }
 
+#if defined(OS_MACOSX)
+TEST_P(AudioEncoderTest, EncodeAac) {
+  RunTestForCodec(CODEC_AUDIO_AAC);
+}
+#endif
+
 static const int64 kOneCall_3Millis[] = {3};
 static const int64 kOneCall_10Millis[] = {10};
 static const int64 kOneCall_13Millis[] = {13};