Fix wrong timing when audio is muted.

media/audio/audio_util.cc

Index: media/audio/audio_util.cc
===================================================================
--- media/audio/audio_util.cc	(revision 140286)
+++ media/audio/audio_util.cc	(working copy)
@@ -260,7 +260,7 @@
 
 void InterleaveFloatToInt(const std::vector<float*>& source, void* dst,
                           size_t number_of_frames, int bytes_per_sample) {
-  switch(bytes_per_sample) {
+  switch (bytes_per_sample) {
     case 1:
       InterleaveFloatToInt<uint8, int32>(source, dst, number_of_frames);
       break;
@@ -281,7 +281,9 @@
 //             when we have to adjust volume as well.
 template<class Format, class Fixed, int min_value, int max_value, int bias>
 static void MixStreams(Format* dst, Format* src, int count, float volume) {
-  if (volume == 1.0f) {
+  if (volume == 0.0f) {
+    return;
+  } else if (volume == 1.0f) {

[scherkus (not reviewing), 2012/06/04 20:52:51]

nit: no need for else

     // Most common case -- no need to adjust volume.
     for (int i = 0; i < count; ++i) {
       Fixed value = AddSaturated<Fixed, min_value, max_value>(dst[i] - bias,