Wire up MediaCapabilities is_supported to MimeUtil

third_party/WebKit/public/platform/modules/media_capabilities/WebAudioConfiguration.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebAudioConfiguration_h
 #define WebAudioConfiguration_h
 
 #include "base/optional.h"
 #include "public/platform/WebString.h"
 
 namespace blink {
 
 // Represents an AudioConfiguration dictionary to be used outside of Blink.
 // It is created by Blink and passed to consumers that can assume that all
 // required fields are properly set.
 struct WebAudioConfiguration {
-  WebString content_type;
+  WebString mime_type;
+  WebString codec;
 
   // `channels` is Optional too but it will be reflected with `isNull()`.
   WebString channels;
   base::Optional<unsigned> bitrate;
   base::Optional<unsigned> samplerate;
 };
 
 }  // namespace blink
 
 #endif  // WebAudioConfiguration_h