Do FilteringNetworkManager::CheckPermission from new Initialize method.

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

 // 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.
 
 #include "content/renderer/media/webrtc/peer_connection_dependency_factory.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 368 matching lines @@
   }
 
   const GURL& requesting_origin =
       GURL(web_frame->document().url()).GetOrigin();
 
   std::unique_ptr<rtc::NetworkManager> network_manager;
   if (port_config.enable_multiple_routes) {
     FilteringNetworkManager* filtering_network_manager =
         new FilteringNetworkManager(network_manager_, requesting_origin,
                                     media_permission);
-    if (media_permission) {
-      // Start permission check earlier to reduce any impact to call set up
-      // time. It's safe to use Unretained here since both destructor and
-      // Initialize can only be called on the worker thread.
-      chrome_worker_thread_.task_runner()->PostTask(
-          FROM_HERE, base::Bind(&FilteringNetworkManager::CheckPermission,
-                                base::Unretained(filtering_network_manager)));
-    }
     network_manager.reset(filtering_network_manager);
   } else {
     network_manager.reset(new EmptyNetworkManager(network_manager_));
   }
   std::unique_ptr<P2PPortAllocator> port_allocator(new P2PPortAllocator(
       p2p_socket_dispatcher_, std::move(network_manager), socket_factory_.get(),
       port_config, requesting_origin));
 
   return GetPcFactory()
       ->CreatePeerConnection(config, std::move(port_allocator),
@@ skipping 169 matching lines @@
 
 void PeerConnectionDependencyFactory::EnsureWebRtcAudioDeviceImpl() {
   DCHECK(CalledOnValidThread());
   if (audio_device_.get())
     return;
 
   audio_device_ = new WebRtcAudioDeviceImpl();
 }
 
 }  // namespace content