Switch Chrome on Linux to libc++

build/config/c++/c++.gni

Index: build/config/c++/c++.gni
diff --git a/build/config/c++/c++.gni b/build/config/c++/c++.gni
index e83c50ecfa9be30fe0319d4a9d20032c2bcb3f53..5a62670afafef626d726682de03ba524f2a956c3 100644
--- a/build/config/c++/c++.gni
+++ b/build/config/c++/c++.gni
@@ -12,8 +12,12 @@ declare_args() {
   # Use libc++ (buildtools/third_party/libc++ and
   # buildtools/third_party/libc++abi) instead of stdlibc++ as standard
   # library.
+  # TODO(thomasanderson): Clean up this complex condition.  The
+  # is_tsan, is_msan, and (use_libfuzzer && !is_mac), clauses can be
+  # removed since they are only used on non-CrOs Linux.  is_ubsan can
+  # probably also be removed for the same reason.
   use_custom_libcxx =
-      (is_asan && is_linux && !is_chromeos &&
-       (!is_chromecast || is_cast_desktop_build)) || is_tsan || is_msan ||
-      is_ubsan || is_ubsan_security || (use_libfuzzer && !is_mac) || use_afl
+      (is_linux && !is_chromeos && (!is_chromecast || is_cast_desktop_build)) ||
+      is_tsan || is_msan || is_ubsan || is_ubsan_security ||
+      (use_libfuzzer && !is_mac) || use_afl
 }