Fixes an audio playback regression caused by seeking in audio/video media.

media/filters/audio_renderer_base.cc

Index: media/filters/audio_renderer_base.cc
diff --git a/media/filters/audio_renderer_base.cc b/media/filters/audio_renderer_base.cc
index 5726bb12f34d7259a9d19250f2a55c57f158e71d..baef036ac4472b105e7f30f093b488ce9dcf6d89 100644
--- a/media/filters/audio_renderer_base.cc
+++ b/media/filters/audio_renderer_base.cc
@@ -144,7 +144,13 @@ size_t AudioRendererBase::FillBuffer(uint8* dest,
 
     // Mute audio by returning 0 when not playing.
     if (state_ != kPlaying) {
-      return 0;
+      // TODO(scherkus): To keep the audio hardware busy we write at most 8k of
+      // zeros.  This gets around the tricky situation of pausing and resuming
+      // the audio IPC layer in Chrome.  Ideally, we should return zero and then
+      // the subclass can restart the conversation.
+      dest_written = std::min(8192u, dest_len);
+      memset(dest, 0, dest_written);
+      return dest_written;
     }
 
     // Save a local copy of last fill buffer time and reset the member.