Revert of Implement support for vp9 in ISO-BMFF

media/base/mime_util_internal.h

Index: media/base/mime_util_internal.h
diff --git a/media/base/mime_util_internal.h b/media/base/mime_util_internal.h
index b96c91368a0a51942c0c537e0674d22f20d8d1fb..67396cf654e11271680c048d17a76daeafc1c2ec 100644
--- a/media/base/mime_util_internal.h
+++ b/media/base/mime_util_internal.h
@@ -111,16 +111,14 @@
 
   // Converts a codec ID into an Codec enum value and indicates
   // whether the conversion was ambiguous.
-  // Returns true if this method was able to map |codec_id| with
-  // |mime_type_lower_case| to a specific Codec enum value. |codec| and
-  // |is_ambiguous| are only valid if true is returned. Otherwise their value is
-  // undefined after the call.
+  // Returns true if this method was able to map |codec_id| to a specific
+  // Codec enum value. |codec| and |is_ambiguous| are only valid if true
+  // is returned. Otherwise their value is undefined after the call.
   // |is_ambiguous| is true if |codec_id| did not have enough information to
   // unambiguously determine the proper Codec enum value. If |is_ambiguous|
   // is true |codec| contains the best guess for the intended Codec enum value.
   // |is_encrypted| means the codec will be used with encrypted blocks.
-  bool StringToCodec(const std::string& mime_type_lower_case,
-                     const std::string& codec_id,
+  bool StringToCodec(const std::string& codec_id,
                      Codec* codec,
                      bool* is_ambiguous,
                      bool is_encrypted) const;