Move AudioDecoder and related stuff to the api/ directory

webrtc/api/audio_codecs/builtin_audio_decoder_factory.h

Index: webrtc/api/audio_codecs/builtin_audio_decoder_factory.h
diff --git a/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h b/webrtc/api/audio_codecs/builtin_audio_decoder_factory.h
similarity index 69%
copy from webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h
copy to webrtc/api/audio_codecs/builtin_audio_decoder_factory.h
index 7bc35863cb03483da21d2e7f254ce8107bae5c5f..f7452f495ca46b73b189d90a1006d460d9f10089 100644
--- a/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h
+++ b/webrtc/api/audio_codecs/builtin_audio_decoder_factory.h
@@ -8,13 +8,11 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_
-#define WEBRTC_MODULES_AUDIO_CODING_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_
-
-#include <memory>
+#ifndef WEBRTC_API_AUDIO_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_
+#define WEBRTC_API_AUDIO_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_
 
+#include "webrtc/api/audio_codecs/audio_decoder_factory.h"
 #include "webrtc/base/scoped_ref_ptr.h"
-#include "webrtc/modules/audio_coding/codecs/audio_decoder_factory.h"
 
 namespace webrtc {
 
@@ -24,4 +22,4 @@ rtc::scoped_refptr<AudioDecoderFactory> CreateBuiltinAudioDecoderFactory();
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_
+#endif  // WEBRTC_API_AUDIO_CODECS_BUILTIN_AUDIO_DECODER_FACTORY_H_