Revert of Add support for device-change notifications to MediaStreamDispatcher

content/browser/renderer_host/media/media_stream_manager.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/browser/renderer_host/media/media_stream_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <algorithm>
@@ skipping 2077 matching lines @@
                         return subscriber == item;
                       }) == device_change_subscribers_.end());
   device_change_subscribers_.push_back(subscriber);
 }
 
 void MediaStreamManager::CancelDeviceChangeNotifications(
     MediaStreamRequester* subscriber) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   auto it = std::find(device_change_subscribers_.begin(),
                       device_change_subscribers_.end(), subscriber);
-  CHECK(it != device_change_subscribers_.end());
+  DCHECK(it != device_change_subscribers_.end());
   device_change_subscribers_.erase(it);
 }
 
 void MediaStreamManager::NotifyDeviceChangeSubscribers(MediaStreamType type) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   for (auto* subscriber : device_change_subscribers_)
     subscriber->DevicesChanged(type);
 }
 
 // static
@@ skipping 35 matching lines @@
   if (!ChildProcessSecurityPolicyImpl::GetInstance()->CanRequestURL(
           render_process_id, ConvertToGURL(origin))) {
     LOG(ERROR) << "MSM: Renderer requested a URL it's not allowed to use.";
     return false;
   }
 
   return true;
 }
 
 }  // namespace content