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

media/gpu/vaapi_picture.cc

Index: media/gpu/vaapi_picture.cc
diff --git a/media/gpu/vaapi_picture.cc b/media/gpu/vaapi_picture.cc
index 921a4249d19cbe855959a2b534a92167cc53d055..3d678ef3bf2e3a8a35195fd697b1411c5800dfc7 100644
--- a/media/gpu/vaapi_picture.cc
+++ b/media/gpu/vaapi_picture.cc
@@ -31,7 +31,9 @@ VaapiPicture::VaapiPicture(
       client_texture_id_(client_texture_id),
       picture_buffer_id_(picture_buffer_id) {}
 
-VaapiPicture::~VaapiPicture() {}
+VaapiPicture::~VaapiPicture() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+}
 
 // static
 linked_ptr<VaapiPicture> VaapiPicture::CreatePicture(