Replace deprecated base::NonThreadSafe in content/renderer/media/webrtc in favor of SequenceChecker.

content/renderer/media/webrtc/peer_connection_dependency_factory.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_PEER_CONNECTION_DEPENDENCY_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_PEER_CONNECTION_DEPENDENCY_FACTORY_H_
 
 #include <string>
 
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/sequence_checker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "content/renderer/media/webrtc/stun_field_trial.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/webrtc/api/peerconnectioninterface.h"
 #include "third_party/webrtc/p2p/stunprober/stunprober.h"
 
 namespace base {
@@ skipping 15 matching lines @@
 }
 
 namespace content {
 
 class IpcNetworkManager;
 class IpcPacketSocketFactory;
 class WebRtcAudioDeviceImpl;
 
 // Object factory for RTC PeerConnections.
 class CONTENT_EXPORT PeerConnectionDependencyFactory
-    : NON_EXPORTED_BASE(base::MessageLoop::DestructionObserver),
-      NON_EXPORTED_BASE(public base::NonThreadSafe) {
+    : NON_EXPORTED_BASE(base::MessageLoop::DestructionObserver) {
  public:
   PeerConnectionDependencyFactory(
       P2PSocketDispatcher* p2p_socket_dispatcher);
   ~PeerConnectionDependencyFactory() override;
 
   // Create a RTCPeerConnectionHandler object that implements the
   // WebKit WebRTCPeerConnectionHandler interface.
   std::unique_ptr<blink::WebRTCPeerConnectionHandler>
   CreateRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client);
@@ skipping 87 matching lines @@
 
   std::unique_ptr<StunProberTrial> stun_trial_;
 
   // PeerConnection threads. signaling_thread_ is created from the
   // "current" chrome thread.
   rtc::Thread* signaling_thread_;
   rtc::Thread* worker_thread_;
   base::Thread chrome_signaling_thread_;
   base::Thread chrome_worker_thread_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(PeerConnectionDependencyFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_PEER_CONNECTION_DEPENDENCY_FACTORY_H_