Roll libc++ from 8e0007980062 to a9779c11d234 (3 revisions)

8e00079800..a9779c11d2

2022-12-07 rprichard@google.com [libc++][Android] Rename user NS to User to avoid conflict with struct
2022-12-06 koraq@xs4all.nl [libc++][CI] Upgrades clang-format version used.
2022-12-06 nikolasklauser@berlin.de [libc++] Fix memory leaks when throwing inside std::vector constructors

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.

To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: hans@chromium.org,thakis@chromium.org
Change-Id: Ia47129264c5ba7b3122f083d0bc1db8780193c5e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4084247
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@{#1080158}

DEPS

@@ -478,7 +478,7 @@ vars = {
 
   # If you change this, also update the libc++ revision in
   # //buildtools/deps_revisions.gni.
-  'libcxx_revision':       '8e000798006200a3e4bb9a5c372daf92648479c0',
+  'libcxx_revision':       'a9779c11d2349375be0c29f7c42d9c42633297b5',
 
   # GN CIPD package version.
   'gn_version': 'git_revision:70d6c60823c0233a0f35eccc25b2b640d2980bdc',

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 = "8e000798006200a3e4bb9a5c372daf92648479c0"
+  libcxx_revision = "a9779c11d2349375be0c29f7c42d9c42633297b5"
 }