Replace AudioDecoderConfig with simple accessors on AudioDecoder.

content/renderer/media/audio_renderer_impl.cc

Index: content/renderer/media/audio_renderer_impl.cc
diff --git a/content/renderer/media/audio_renderer_impl.cc b/content/renderer/media/audio_renderer_impl.cc
index 899bf4438c68d8fd7503d041f30e056b83a337c9..7740c40f2c1a96961667c8af7bc045e23bdb871a 100644
--- a/content/renderer/media/audio_renderer_impl.cc
+++ b/content/renderer/media/audio_renderer_impl.cc
@@ -83,9 +83,11 @@ void AudioRendererImpl::UpdateEarliestEndTime(int bytes_filled,
   }
 }
 
-bool AudioRendererImpl::OnInitialize(const media::AudioDecoderConfig& config) {
-  AudioParameters params(config);
-  params.format = AudioParameters::AUDIO_PCM_LINEAR;
+bool AudioRendererImpl::OnInitialize(int bits_per_channel,
+                                     ChannelLayout channel_layout,
+                                     int sample_rate) {
+  AudioParameters params(AudioParameters::AUDIO_PCM_LINEAR, channel_layout,
+                         sample_rate, bits_per_channel, kSamplesPerBuffer);
 
   bytes_per_second_ = params.GetBytesPerSecond();