Modify ARAB to use simpler data types in FillBuffer() calls.

media/filters/audio_renderer_algorithm_default.cc

Index: media/filters/audio_renderer_algorithm_default.cc
===================================================================
--- media/filters/audio_renderer_algorithm_default.cc	(revision 20829)
+++ media/filters/audio_renderer_algorithm_default.cc	(working copy)
@@ -5,7 +5,6 @@
 #include "media/filters/audio_renderer_algorithm_default.h"
 
 #include "media/base/buffers.h"
-#include "media/base/data_buffer.h"
 
 namespace media {
 
@@ -15,7 +14,7 @@
 AudioRendererAlgorithmDefault::~AudioRendererAlgorithmDefault() {
 }
 
-size_t AudioRendererAlgorithmDefault::FillBuffer(DataBuffer* buffer_out) {
+size_t AudioRendererAlgorithmDefault::FillBuffer(uint8* dest, size_t length) {
   if (playback_rate() == 0.0f) {
     return 0;
   }
@@ -23,20 +22,17 @@
   size_t dest_written = 0;
 
   if (playback_rate() == 1.0f) {
-    size_t dest_length = buffer_out->GetDataSize();
-    uint8* dest = buffer_out->GetWritableData();
-
     // If we don't have enough data, copy what we have.
-    if (QueueSize() < dest_length)
+    if (QueueSize() < length)
       dest_written = CopyFromInput(dest, QueueSize());
     else
-      dest_written = CopyFromInput(dest, dest_length);
+      dest_written = CopyFromInput(dest, length);
     AdvanceInputPosition(dest_written);
   } else {
     // Mute (we will write to the whole buffer, so set |dest_written| to the
     // requested size).
-    dest_written = buffer_out->GetDataSize();
-    memset(buffer_out->GetWritableData(), 0, dest_written);
+    dest_written = length;
+    memset(dest, 0, dest_written);
 
     // Calculate the number of bytes we "used".
     size_t scaled_dest_length =