Add a list of allowed and disallowed Abseil things
Bug: webrtc:8821
Change-Id: Ifb3bacd3403bbf823c78fff47571a83159f1da73
No-Try: True
Reviewed-on: https://webrtc-review.googlesource.com/95880
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24437}
diff --git a/style-guide.md b/style-guide.md
index 50f45fc..2a35fdc 100644
--- a/style-guide.md
+++ b/style-guide.md
@@ -31,6 +31,13 @@
[chromium-cpp11]: https://chromium-cpp.appspot.com/
+### Abseil
+
+You may use a subset of the utilities provided by the [Abseil][abseil]
+library when writing WebRTC C++ code. [Details](abseil-in-webrtc.md).
+
+[abseil]: https://abseil.io/about/
+
### <a name="h-cc-pairs"></a>`.h` and `.cc` files come in pairs
`.h` and `.cc` files should come in pairs, with the same name (except