Lots of files touched for a very simple change. Everywhere we used a const M...

media/filters/null_audio_renderer.cc

 // Copyright (c) 2009 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 <cmath>
 
 #include "media/base/filter_host.h"
 #include "media/filters/null_audio_renderer.h"
 
 namespace media {
@@ skipping 11 matching lines @@
       thread_(NULL),
       shutdown_(false) {
 }
 
 NullAudioRenderer::~NullAudioRenderer() {
   Stop();
 }
 
 // static
 bool NullAudioRenderer::IsMediaFormatSupported(
-    const MediaFormat* media_format) {
+    const MediaFormat& media_format) {
   int channels;
   int sample_rate;
   int sample_bits;
   return ParseMediaFormat(media_format, &channels, &sample_rate, &sample_bits);
 }
 
 void NullAudioRenderer::SetPlaybackRate(float playback_rate) {
   playback_rate_ = playback_rate;
 }
 
@@ skipping 13 matching lines @@
       // Calculate our sleep duration, taking playback rate into consideration.
       sleep_in_milliseconds =
           floor(bytes / static_cast<float>(bytes_per_millisecond_));
       sleep_in_milliseconds /= playback_rate_;
     }
 
     PlatformThread::Sleep(static_cast<int>(sleep_in_milliseconds));
   }
 }
 
-bool NullAudioRenderer::OnInitialize(const MediaFormat* media_format) {
+bool NullAudioRenderer::OnInitialize(const MediaFormat& media_format) {
   // Parse out audio parameters.
   int channels;
   int sample_rate;
   int sample_bits;
   if (!ParseMediaFormat(media_format, &channels, &sample_rate, &sample_bits)) {
     return false;
   }
 
   // Calculate our bytes per millisecond value and allocate our buffer.
   bytes_per_millisecond_ = (channels * sample_rate * sample_bits / 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 PlatformThread::Create(0, this, &thread_);
 }
 
 void NullAudioRenderer::OnStop() {
   shutdown_ = true;
   if (thread_)
     PlatformThread::Join(thread_);
 }
 
 }  // namespace media