Revert r95841 due to failing media_unittests on linux_shared bot.

media/audio/audio_parameters.h

Index: media/audio/audio_parameters.h
===================================================================
--- media/audio/audio_parameters.h	(revision 95843)
+++ media/audio/audio_parameters.h	(working copy)
@@ -7,11 +7,10 @@
 
 #include "base/basictypes.h"
 #include "media/base/audio_decoder_config.h"
-#include "media/base/media_export.h"
 
-struct MEDIA_EXPORT AudioParameters {
+struct AudioParameters {
   // Compare is useful when AudioParameters is used as a key in std::map.
-  class MEDIA_EXPORT Compare {
+  class Compare {
    public:
     bool operator()(const AudioParameters& a, const AudioParameters& b) const;
   };
@@ -20,7 +19,7 @@
     AUDIO_PCM_LINEAR = 0,     // PCM is 'raw' amplitude samples.
     AUDIO_PCM_LOW_LATENCY,    // Linear PCM, low latency requested.
     AUDIO_MOCK,               // Creates a dummy AudioOutputStream object.
-    AUDIO_LAST_FORMAT         // Only used for validation of format.y
+    AUDIO_LAST_FORMAT         // Only used for validation of format.
   };
 
   // Telephone quality sample rate, mostly for speech-only audio.