tree ea892710a10f203220e6f577cc317a7975867143
parent 4b7fefa4349eeecdf4a15e0f463f0293765bcc67
author diannahu <diannahu@google.com> 1705524950 -0800
committer Copybara-Service <copybara-worker@google.com> 1705525024 -0800

Move MetadataFrameSequence from third_party/spdy/core to gfe/gfe2/metadata.

This CL moves //third_party/spdy/core:metadata_extension_lib to
//gfe/gfe2/metadata:metadata_frame_sequence. With this move, this CL also
removes MetadataVisitor, which was unused outside of tests. The MetadataVisitor
tests are arguably covered by MetadataManager tests, e.g.:
  - MetadataExtensionTest.MetadataNotSupported -->
    MetadataManagerTest.MetadataNotSupported
  - MetadataExtensionTest.MetadataSupported -->
    MetadataManagerTest.MetadataSupported
  - MetadataExtensionTest.MetadataDeliveredToUnknownFrameCallbacks -->
    MetadataManagerTest.SetUp() [1]
  - MetadataExtensionTest.MetadataPayloadEndToEnd -->
    MetadataManagerTest.SendAndReceiveMetadata
  - MetadataExtensionTest.MetadataPayloadInterleaved -->
    MetadataManagerTest.ReceivedMetadataPayloadInterleaved

The net effect is some code removal, with less code that needs to be moved from
//third_party/spdy to third_party/http2.

#cleanup

[1]
http://google3/gfe/gfe2/metadata/metadata_manager_test.cc;l=210-224;rcl=565024527,
and I can add an explicit test if helpful

PiperOrigin-RevId: 599261755