Replace AudioDecoderConfig with simple accessors on AudioDecoder.

media/filters/null_audio_renderer.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/threading/platform_thread.h"
 #include "media/base/filter_host.h"
@@ skipping 42 matching lines @@
       // If paused, sleep for 10 milliseconds before polling again.
       sleep_in_milliseconds = 10.0f;
     }
 
     // Sleep for at least one millisecond so we don't spin the CPU.
     base::PlatformThread::Sleep(
         std::max(1, static_cast<int>(sleep_in_milliseconds)));
   }
 }
 
-bool NullAudioRenderer::OnInitialize(const AudioDecoderConfig& config) {
+bool NullAudioRenderer::OnInitialize(int bits_per_channel,
+                                     ChannelLayout channel_layout,
+                                     int sample_rate) {
   // Calculate our bytes per millisecond value and allocate our buffer.
   bytes_per_millisecond_ =
-      (ChannelLayoutToChannelCount(config.channel_layout) * config.sample_rate *
-       config.bits_per_channel / 8) / base::Time::kMillisecondsPerSecond;
+      (ChannelLayoutToChannelCount(channel_layout) * sample_rate *
+       bits_per_channel / 8) / base::Time::kMillisecondsPerSecond;
   buffer_size_ = bytes_per_millisecond_ * kBufferSizeInMilliseconds;
   buffer_.reset(new uint8[buffer_size_]);
   DCHECK(buffer_.get());
 
   // It's safe to start the thread now because it simply sleeps when playback
   // rate is 0.0f.
   return base::PlatformThread::Create(0, this, &thread_);
 }
 
 void NullAudioRenderer::OnStop() {
   shutdown_ = true;
   if (thread_) {
     base::PlatformThread::Join(thread_);
     thread_ = base::kNullThreadHandle;
   }
 }
 
 }  // namespace media