Deleting the copresence API.

components/copresence/public/copresence_constants.h

-// Copyright 2014 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 COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_CONSTANTS_H_
-#define COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_CONSTANTS_H_
-
-#include <google/protobuf/repeated_field.h>
-
-#include <string>
-#include <vector>
-
-#include "base/callback_forward.h"
-#include "base/memory/ref_counted.h"
-#include "components/copresence/tokens.h"
-#include "media/base/channel_layout.h"
-
-namespace media {
-class AudioBusRefCounted;
-}
-
-namespace copresence {
-
-class Directive;
-class SubscribedMessage;
-
-// Callback to pass a list of directives back to CopresenceState.
-using DirectivesCallback = base::Callback<void(const std::vector<Directive>&)>;
-
-// Callback to pass around a list of SubscribedMessages.
-using MessagesCallback = base::Callback<void(
-    const google::protobuf::RepeatedPtrField<SubscribedMessage>&)>;
-
-}  // namespace copresence
-
-#endif  // COMPONENTS_COPRESENCE_PUBLIC_COPRESENCE_CONSTANTS_H_