Fix ChunkDemuxer seek deadlock

media/filters/audio_renderer_base.h

Index: media/filters/audio_renderer_base.h
diff --git a/media/filters/audio_renderer_base.h b/media/filters/audio_renderer_base.h
index a57820495e601d7feda4abd8d9dccce023a170ba..0c2e939f885c80e48de16d3a663d98f264155260 100644
--- a/media/filters/audio_renderer_base.h
+++ b/media/filters/audio_renderer_base.h
@@ -99,6 +99,15 @@ class MEDIA_EXPORT AudioRendererBase : public AudioRenderer {
   // Safe to call from any thread.
   void ScheduleRead_Locked();
 
+  // Returns true if the data in the buffer is all before
+  // |seek_timestamp_|. This can only return true while
+  // in the kSeeking state.
+  bool IsBeforeSeekTime(const scoped_refptr<Buffer>& buffer);
+
+  // Enqueues |buffer| in |algorithm_| if it is non-NULL and
+  // buffer->IsEndOfStream() returns false.
+  void EnqueueBuffer(const scoped_refptr<Buffer>& buffer);
+
   // Audio decoder.
   scoped_refptr<AudioDecoder> decoder_;
 
@@ -114,7 +123,6 @@ class MEDIA_EXPORT AudioRendererBase : public AudioRenderer {
     kSeeking,
     kPlaying,
     kStopped,
-    kError,
     kUnderflow,
     kRebuffering,
   };