--
751781aa5b9e998f84a8a7e00789c80d3338730e by Abseil Team <absl-team@google.com>:

Fix attributes.h compilation with -Wundef flag in C

PiperOrigin-RevId: 347394915

--
66070a8166b0e1a61236b954d07fbb378f4f990b by Abseil Team <absl-team@google.com>:

Revert the usage of variant<> in Cord iterator and reader.

The introduction of the variant may lead to some missed compiler optimizations.

PiperOrigin-RevId: 347384869
GitOrigin-RevId: 751781aa5b9e998f84a8a7e00789c80d3338730e
Change-Id: Ibf1190d498a6f968f2ea9b89467ccfb5224dafa8