export DeinterleaveAudioChannel from the media DLL - it is needed by

media/audio/audio_util.h

Index: media/audio/audio_util.h
diff --git a/media/audio/audio_util.h b/media/audio/audio_util.h
index d95a6462922e08c9fb76d543b42578684b112964..ff8f2f0173f84af6aaca87b3dc0f99ac1bc27fa9 100644
--- a/media/audio/audio_util.h
+++ b/media/audio/audio_util.h
@@ -62,12 +62,12 @@ MEDIA_EXPORT bool FoldChannels(void* buf,
 // puts it in the floating point |destination|.
 // It returns |true| on success, or |false| if the |sample_fmt| is
 // not recognized.
-bool DeinterleaveAudioChannel(void* source,
-                              float* destination,
-                              int channels,
-                              int channel_index,
-                              int bytes_per_sample,
-                              size_t number_of_frames);
+MEDIA_EXPORT bool DeinterleaveAudioChannel(void* source,
+                                           float* destination,
+                                           int channels,
+                                           int channel_index,
+                                           int bytes_per_sample,
+                                           size_t number_of_frames);
 
 // InterleaveFloatToInt16 scales, clips, and interleaves the planar
 // floating-point audio contained in |source| to the int16 |destination|.