Do FilteringNetworkManager::CheckPermission from new Initialize method.

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.cc
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
index 4e9da8b9cf2e5f365791088c51239b312dd123ea..6c886e9df99fe47426fcb0300faf83ef840023d5 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
@@ -386,14 +386,6 @@ PeerConnectionDependencyFactory::CreatePeerConnection(
     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_));