Revert of Add support for device-change notifications to MediaStreamDispatcher

content/renderer/media/user_media_client_impl.cc

 // 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.
 
 #include "content/renderer/media/user_media_client_impl.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 756 matching lines @@
            << request_id << ", " << label << ")";
   NOTIMPLEMENTED();
 }
 
 void UserMediaClientImpl::OnDeviceOpenFailed(int request_id) {
   DVLOG(1) << "UserMediaClientImpl::VideoDeviceOpenFailed("
            << request_id << ")";
   NOTIMPLEMENTED();
 }
 
-void UserMediaClientImpl::OnDevicesChanged() {
-  DVLOG(1) << "UserMediaClientImpl::OnDevicesChanged()";
-  NOTIMPLEMENTED();
-}
-
 void UserMediaClientImpl::GetUserMediaRequestSucceeded(
     const blink::WebMediaStream& stream,
     blink::WebUserMediaRequest request_info) {
   // Completing the getUserMedia request can lead to that the RenderFrame and
   // the UserMediaClientImpl is destroyed if the JavaScript code request the
   // frame to be destroyed within the scope of the callback. Therefore,
   // post a task to complete the request with a clean stack.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&UserMediaClientImpl::DelayedGetUserMediaRequestSucceeded,
@@ skipping 364 matching lines @@
       return;
     }
   }
 }
 
 bool UserMediaClientImpl::UserMediaRequestInfo::HasPendingSources() const {
   return !sources_waiting_for_callback_.empty();
 }
 
 }  // namespace content