media: Use associated interface for mojo AudioDecoderClient

media/mojo/interfaces/audio_decoder.mojom

Index: media/mojo/interfaces/audio_decoder.mojom
diff --git a/media/mojo/interfaces/audio_decoder.mojom b/media/mojo/interfaces/audio_decoder.mojom
index b46e769fd226a4615d03ae53582be3710ab09057..9833aeea6470076af604e704add20350d2969c15 100644
--- a/media/mojo/interfaces/audio_decoder.mojom
+++ b/media/mojo/interfaces/audio_decoder.mojom
@@ -11,8 +11,8 @@ interface AudioDecoder {
   // For the unencrypted streams the |cdm_id| is ignored. Executed the callback
   // with whether the initialization succeeded, and whether the pipeline needs
   // bitstream conversion.
-  Initialize(AudioDecoderClient client, AudioDecoderConfig config, int32 cdm_id)
-     => (bool success, bool needs_bitstream_conversion);
+  Initialize(associated AudioDecoderClient client, AudioDecoderConfig config,
+             int32 cdm_id) => (bool success, bool needs_bitstream_conversion);
 
   // Establishes data connection. Should be called before Decode().
   SetDataSource(handle<data_pipe_consumer> receive_pipe);