Remove old media-device enumeration IPC message

content/common/media/media_stream_messages.h

 // Copyright (c) 2012 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 media streaming.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "content/common/content_export.h"
@@ skipping 59 matching lines @@
 IPC_MESSAGE_ROUTED2(MediaStreamMsg_StreamGenerationFailed,
                     int /* request id */,
                     content::MediaStreamRequestResult /* result */)
 
 // The browser reports that a media device has been stopped. Stopping was
 // triggered from the browser process.
 IPC_MESSAGE_ROUTED2(MediaStreamMsg_DeviceStopped,
                     std::string /* label */,
                     content::StreamDeviceInfo /* the device */)
 
-// The browser has enumerated devices. If no devices are found
-// |device_list| is empty.
-// Used by Pepper and WebRTC.
-IPC_MESSAGE_ROUTED2(MediaStreamMsg_DevicesEnumerated,
-                    int /* request id */,
-                    content::StreamDeviceInfoArray /* device_list */)
-
 // TODO(wjia): should DeviceOpen* messages be merged with
 // StreamGenerat* ones?
 // The browser has opened a device successfully.
 IPC_MESSAGE_ROUTED3(MediaStreamMsg_DeviceOpened,
                     int /* request id */,
                     std::string /* label */,
                     content::StreamDeviceInfo /* the device */)
 
 // The browser has failed to open a device.
 IPC_MESSAGE_ROUTED1(MediaStreamMsg_DeviceOpenFailed,
@@ skipping 36 matching lines @@
 // connected video sinks meet the requirement of output protection.).
 // Note: the browser process only trusts the |is_sucure| value in this IPC
 // message if it's comimg from a trusted, whitelisted extension. Extensions run
 // in separate render processes. So it shouldn't be possible, for example, for
 // a user's visit to a malicious web page to compromise a render process running
 // a trusted extension to make it report falsehood in this IPC message.
 IPC_MESSAGE_CONTROL3(MediaStreamHostMsg_SetCapturingLinkSecured,
                      int,                      /* session_id */
                      content::MediaStreamType, /* type */
                      bool /* is_secure */)