media: Change auto to not deduce raw pointers.

media/filters/ffmpeg_demuxer.cc

Index: media/filters/ffmpeg_demuxer.cc
diff --git a/media/filters/ffmpeg_demuxer.cc b/media/filters/ffmpeg_demuxer.cc
index 76ac688f911fd68f56ddc6cbbc8dbc451964f466..83b1879d1e4eb687f4ca3e3e4f10cb44ee4d1ca0 100644
--- a/media/filters/ffmpeg_demuxer.cc
+++ b/media/filters/ffmpeg_demuxer.cc
@@ -975,7 +975,7 @@ void FFmpegDemuxer::AddTextStreams() {
 
 int64_t FFmpegDemuxer::GetMemoryUsage() const {
   int64_t allocation_size = 0;
-  for (const auto& stream : streams_) {
+  for (auto* stream : streams_) {
     if (stream)
       allocation_size += stream->MemoryUsage();
   }
@@ -1611,7 +1611,7 @@ void FFmpegDemuxer::OnDataSourceError() {
 
 void FFmpegDemuxer::SetLiveness(DemuxerStream::Liveness liveness) {
   DCHECK(task_runner_->BelongsToCurrentThread());
-  for (const auto& stream : streams_) {  // |stream| is a ref to a pointer.
+  for (auto* stream : streams_) {
     if (stream)
       stream->SetLiveness(liveness);
   }