Delete the audio modem and copresence private APIs.

chrome/common/extensions/api/audio_modem.idl

-// Copyright 2015 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.
-
-// Use the <code>chrome.audio_modem</code> API
-// to transmit and receive short tokens over audio.
-namespace audioModem {
-  // The audio bands supported.
-  enum Audioband {
-    // Audible (up to 3 kHz)
-    audible,
-    // Inaudible (18-20 kHz)
-    inaudible
-  };
-
-  // Details for how a token is encoded in audio.
-  dictionary TokenEncoding {
-    // The length of the tokens to transmit, in bytes.
-    // For now, apps must always use the same token length.
-    long tokenLength;
-    // Whether to use a 2-byte CRC checksum. Defaults to false.
-    boolean? crc;
-    // Whether to use a parity symbol. Defaults to false.
-    boolean? parity;
-  };
-
-  // Details of a transmit or receive request.
-  dictionary RequestParams {
-    // How long to transmit or receive for.
-    // The timeout has a maximum of 10 minutes for transmit,
-    // or 1 hour for receive.
-    long timeoutMillis;
-    // The audio band to use.
-    Audioband band;
-    // The token encoding details.
-    TokenEncoding encoding;
-  };
-
-  // Results of token decoding.
-  dictionary ReceivedToken {
-    // The token contents in raw bytes.
-    ArrayBuffer token;
-    // The audio band the token was heard on.
-    Audioband band;
-  };
-
-  // The result of a requested operation.
-  enum Status {
-    // The requested operation was processed successfully.
-    success,
-    // The request was invalid. See chrome.runtime.lastError for details.
-    invalidRequest,
-    // The requested audio band is already in use by another client.
-    // Eventually, simultaneous tokens will be time-sliced,
-    // and this error will no longer occur.
-    inUse,
-    // Audio encoding or decoding failed.
-    coderError
-  };
-
-  // A callback to report the status of a request.
-  callback StatusCallback = void(Status status);
-
-  interface Functions {
-    // Transmit a token. Only one can be transmitted at a time.
-    // Transmission of any previous tokens (by this app) will stop.
-    static void transmit(
-        RequestParams params, ArrayBuffer token, StatusCallback callback);
-    // Stop any active transmission on the specified band.
-    static void stopTransmit(Audioband band, StatusCallback callback);
-    // Start listening for audio tokens. For now,
-    // only one app will be able to listen at a time.
-    static void receive(RequestParams params, StatusCallback callback);
-    // Stop any active listening on the specified band.
-    static void stopReceive(Audioband band, StatusCallback callback);
-  };
-
-  interface Events {
-    // Audio tokens have been received.
-    static void onReceived(ReceivedToken[] tokens);
-    // Transmit could not be confirmed.
-    // The speaker volume might be too low.
-    static void onTransmitFail(Audioband band);
-  };
-};
-