Update rtc_tools to not use implicit T* --> scoped_refptr<T> conversion

Bug: webrtc:13464
Change-Id: Ieb7747eaf466254c6feaf5670846b897d700ad07
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/246101
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35680}
diff --git a/rtc_tools/video_file_reader.cc b/rtc_tools/video_file_reader.cc
index bfdcba4..c6fa587 100644
--- a/rtc_tools/video_file_reader.cc
+++ b/rtc_tools/video_file_reader.cc
@@ -110,11 +110,11 @@
 }
 
 Video::Iterator Video::begin() const {
-  return Iterator(this, 0);
+  return Iterator(rtc::scoped_refptr<const Video>(this), 0);
 }
 
 Video::Iterator Video::end() const {
-  return Iterator(this, number_of_frames());
+  return Iterator(rtc::scoped_refptr<const Video>(this), number_of_frames());
 }
 
 rtc::scoped_refptr<Video> OpenY4mFile(const std::string& file_name) {