tree feca0069d64e9f34d36a83a42fd79fe45ed255da
parent 8af58e5779e2684d2ee3af8b7a7e234f7d29d9e7
author bnc <bnc@google.com> 1657732516 -0700
committer Copybara-Service <copybara-worker@google.com> 1657732746 -0700

Remove FrameSequence and MetadataSerializer.

FrameSequence is an interface only implemented by MetadataFrameSequence (in
anonymous namespace).  Remove the interface and make MetadataFrameSequence
public.

MetadataSerializer is a trivial class with no members and only one factory
method that creates a MetadataFrameSequence on the heap.  Remove that class.

Also remove the factory method.  Change call sites to instantiate
MetadataFrameSequence on the stack instead of the heap.

PiperOrigin-RevId: 460745625