Replace deprecated base::NonThreadSafe in media/capture/video in favor of SequenceChecker.

media/capture/video/win/video_capture_device_mf_win.h

Index: media/capture/video/win/video_capture_device_mf_win.h
diff --git a/media/capture/video/win/video_capture_device_mf_win.h b/media/capture/video/win/video_capture_device_mf_win.h
index 68cd4f8b489bb46a59ecda81ecb34add7e3291bf..3b2b7e3a05917d9f40855670658051f330580b9f 100644
--- a/media/capture/video/win/video_capture_device_mf_win.h
+++ b/media/capture/video/win/video_capture_device_mf_win.h
@@ -16,8 +16,8 @@
 #include <vector>
 
 #include "base/macros.h"
+#include "base/sequence_checker.h"
 #include "base/synchronization/lock.h"
-#include "base/threading/non_thread_safe.h"
 #include "base/win/scoped_comptr.h"
 #include "media/capture/capture_export.h"
 #include "media/capture/video/video_capture_device.h"
@@ -35,8 +35,7 @@ class MFReaderCallback;
 const DWORD kFirstVideoStream =
     static_cast<DWORD>(MF_SOURCE_READER_FIRST_VIDEO_STREAM);
 
-class CAPTURE_EXPORT VideoCaptureDeviceMFWin : public base::NonThreadSafe,
-                                               public VideoCaptureDevice {
+class CAPTURE_EXPORT VideoCaptureDeviceMFWin : public VideoCaptureDevice {
  public:
   static bool FormatFromGuid(const GUID& guid, VideoPixelFormat* format);
 
@@ -73,6 +72,8 @@ class CAPTURE_EXPORT VideoCaptureDeviceMFWin : public base::NonThreadSafe,
   VideoCaptureFormat capture_format_;
   bool capture_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceMFWin);
 };