This temporarily unblocks a related gtest upgrade. The ultimate goal is
to upgraade our gtest dependencies, but I don't have the cycles to
manage a potentially messy migration until at least next week. This PR
is coordinated with an internal change.
* Revert "Revert "Expose trailers-only response status through C++ callback API (#26249)" (#26363)"
This reverts commit 05c3b30ea0.
* Move the trailers_only check from ClientContext to ClientReactor
* Remove unneeded change in client_context.cc
* Expose trailers-only response status through callback API
* Fix change-detector test
* Address reviewer comment about trailers_only headers
* Add TODO requested by markdroth
* Move variable in struct to improve space efficiency
* Don't instantiate ExecCtx in channel_args destructor unless needed
This replaces gflags. Added TODOs where use of `absl::Duration` or `absl::FlagSaver` might be preferred in follow-up cleanup. Fixes#24493.
This reverts commit da66b7d14e.
NEW:
* Adds references to `absl/flags/declare.h`, new to LTS 2020923.2 imported in commit 5b43440.
* Works around MSVC 2017 compiler error with large help text on flags by reducing the help text.
This replaces several mutually-exclusive flags for a single selector flag which defines
the base channel type. It also allows child classes to selectively override the defaults
and provide additional channel types (e.g., LOAS in the mono repo).
Fixes issue #16060.
This cribs from test_credentials_provider.cc, but without using `grpc::ChannelArguments`, as the grpc CLI is responsible for setting that according to the flag.