Split out audio debug recording from RenderProcessHostImpl.

content/common/media/aec_dump_messages.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.
-
-// IPC messages for the AEC dump.
-// Multiply-included message file, hence no include guard.
-
-#include "content/common/content_export.h"
-#include "ipc/ipc_message_macros.h"
-#include "ipc/ipc_platform_file.h"
-
-#undef IPC_MESSAGE_EXPORT
-#define IPC_MESSAGE_EXPORT CONTENT_EXPORT
-#define IPC_MESSAGE_START AecDumpMsgStart
-
-// Messages sent from the browser to the renderer.
-
-// The browser hands over a file handle to the consumer in the renderer
-// identified by |id| to use for AEC dump.
-IPC_MESSAGE_CONTROL2(AecDumpMsg_EnableAecDump,
-                     int /* id */,
-                     IPC::PlatformFileForTransit /* file_handle */)
-
-// Tell the renderer to disable AEC dump in all consumers.
-IPC_MESSAGE_CONTROL0(AecDumpMsg_DisableAecDump)
-
-// Messages sent from the renderer to the browser.
-
-// Registers a consumer with the browser. The consumer will then get a file
-// handle when the dump is enabled.
-IPC_MESSAGE_CONTROL1(AecDumpMsg_RegisterAecDumpConsumer,
-                     int /* id */)
-
-// Unregisters a consumer with the browser.
-IPC_MESSAGE_CONTROL1(AecDumpMsg_UnregisterAecDumpConsumer,
-                     int /* id */)