Move AudioDecoder and related stuff to the api/ directory

webrtc/api/audio_codecs/audio_format.h

Index: webrtc/api/audio_codecs/audio_format.h
diff --git a/webrtc/modules/audio_coding/codecs/audio_format.h b/webrtc/api/audio_codecs/audio_format.h
similarity index 88%
rename from webrtc/modules/audio_coding/codecs/audio_format.h
rename to webrtc/api/audio_codecs/audio_format.h
index 6f2c8cfa54e150b32d3f1a597f45f0d7dd98b4ff..db3990f1143bf5fffc5ff233abb837dda79b533c 100644
--- a/webrtc/modules/audio_coding/codecs/audio_format.h
+++ b/webrtc/api/audio_codecs/audio_format.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
-#define WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
+#ifndef WEBRTC_API_AUDIO_CODECS_AUDIO_FORMAT_H_
+#define WEBRTC_API_AUDIO_CODECS_AUDIO_FORMAT_H_
 
 #include <map>
 #include <ostream>
@@ -70,12 +70,12 @@ struct AudioCodecSpec {
   ~AudioCodecSpec() = default;
 
   SdpAudioFormat format;
-  bool allow_comfort_noise = true;    // This codec can be used with an external
-                                      // comfort noise generator.
+  bool allow_comfort_noise = true;  // This codec can be used with an external
+                                    // comfort noise generator.
   bool supports_network_adaption = false;  // This codec can adapt to varying
                                            // network conditions.
 };
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
+#endif  // WEBRTC_API_AUDIO_CODECS_AUDIO_FORMAT_H_