Roll libc++ from 6f4617b9efc3 to 63a3e673a7d1 (13 revisions)

https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git/+log/6f4617b9efc3..63a3e673a7d1

2023-02-17 nikolasklauser@berlin.de [libc++][NFC] Remove TODOs that are already done
2023-02-17 nikolasklauser@berlin.de [libc++][NFC] Replace _VSTD and _LIBCPP_INLINE_VISIBILITY in <__atomic/*>
2023-02-17 koraq@xs4all.nl [libc++][format] Addresses LWG3810.
2023-02-17 varconst@apple.com [libc++] Mark a test relying on `typeid` as unsupported without RTTI.
2023-02-17 nikolasklauser@berlin.de [libc++] Add missing include in <__atomic/cxx_atomic_impl.h>
2023-02-17 koraq@xs4all.nl [lib++][format] Uses the new exception test macros.
2023-02-17 koraq@xs4all.nl [libc++] Fixes a flaky test.
2023-02-17 koraq@xs4all.nl [libc++][CI] Switches to clang-format-16.
2023-02-17 koraq@xs4all.nl [libc++] Improve the format ignorelist generation.
2023-02-17 nikolasklauser@berlin.de [libc++][NFC] Rename _LIBCPP_NO_EXCEPTIONS to _LIBCPP_HAS_NO_EXCEPTIONS
2023-02-17 koraq@xs4all.nl [libc++][test] Adds more generic test macros.
2023-02-17 nikolasklauser@berlin.de [libc++] Granularize <atomic>
2023-02-17 nikolasklauser@berlin.de [libc++] Granularize <bit> includes

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/libcxx-chromium
Please CC hans@chromium.org,thakis@chromium.org on the revert to ensure that a human
is aware of the problem.

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https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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Tbr: hans@chromium.org,thakis@chromium.org
Change-Id: Ib64dbc54c44494215e13dc666fc7c811eaba4f6f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4265493
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1107078}

DEPS

@@ -490,7 +490,7 @@ vars = {
 
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision':       '6f4617b9efc36525e030ec9855114f3c93550ec1',
+  'libcxx_revision':       '63a3e673a7d193de5d38cb0d52d697cafb2f4be9',
 
   # GN CIPD package version.
   'gn_version': 'git_revision:edf6ef4b06b42c58292faea78498aff76bdf68ed',

buildtools/deps_revisions.gni

@@ -5,5 +5,5 @@
 declare_args() {
   # Used to cause full rebuilds on libc++ rolls. This should be kept in sync
   # with the libcxx_revision vars in //DEPS.
-  libcxx_revision = "6f4617b9efc36525e030ec9855114f3c93550ec1"
+  libcxx_revision = "63a3e673a7d193de5d38cb0d52d697cafb2f4be9"
 }