Fix muted audio when playback rate != 1.0 or 0.0

content/renderer/media/audio_hardware.cc

Index: content/renderer/media/audio_hardware.cc
diff --git a/content/renderer/media/audio_hardware.cc b/content/renderer/media/audio_hardware.cc
index 183ebecd529510bea3e2d132f02ebe447f44ea10..7bc742a78c2c555cb25b45f5874b9081b8a09041 100644
--- a/content/renderer/media/audio_hardware.cc
+++ b/content/renderer/media/audio_hardware.cc
@@ -48,6 +48,19 @@ size_t GetOutputBufferSize() {
   return output_buffer_size;
 }
 
+size_t GetHighLatencyOutputBufferSize(int sample_rate) {
+  // kNominalBufferSize has been tested on Windows, Mac OS X, and Linux
+  // with the AUDIO_PCM_LINEAR flag.
+  const size_t kNominalBufferSize = 2048;
+
+  if (sample_rate <= 48000)
+    return kNominalBufferSize;
+  else if (sample_rate <= 96000)
+    return kNominalBufferSize * 2;
+
+  return kNominalBufferSize * 4;
+}
+
 uint32 GetInputChannelCount() {
   DCHECK(RenderThreadImpl::current() != NULL);