Sanitizers: Roll in 16 months of libcxx and libcxxabi changes.

third_party/libc++abi/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 config("libc++abi_warnings") {
   if (is_clang) {
     # http://llvm.org/PR25978
     cflags = [ "-Wno-unused-function" ]
   }
 }
 
 static_library("libc++abi") {
   sources = [
     "trunk/src/abort_message.cpp",
     "trunk/src/cxa_aux_runtime.cpp",
     "trunk/src/cxa_default_handlers.cpp",
     "trunk/src/cxa_demangle.cpp",
     "trunk/src/cxa_exception.cpp",
     "trunk/src/cxa_exception_storage.cpp",
     "trunk/src/cxa_guard.cpp",
     "trunk/src/cxa_handlers.cpp",
-    "trunk/src/cxa_new_delete.cpp",
+
+    # This file is supposed to be used in fno-exception builds of
+    # libc++abi.  We build lib++/libc++abi with exceptions enabled.
+    #"trunk/src/cxa_noexception.cpp",
     "trunk/src/cxa_personality.cpp",
     "trunk/src/cxa_thread_atexit.cpp",
     "trunk/src/cxa_unexpected.cpp",
     "trunk/src/cxa_vector.cpp",
     "trunk/src/cxa_virtual.cpp",
-    "trunk/src/exception.cpp",
+    "trunk/src/fallback_malloc.cpp",
     "trunk/src/private_typeinfo.cpp",
-    "trunk/src/stdexcept.cpp",
-    "trunk/src/typeinfo.cpp",
+    "trunk/src/stdlib_exception.cpp",
+    "trunk/src/stdlib_new_delete.cpp",
+    "trunk/src/stdlib_stdexcept.cpp",
+    "trunk/src/stdlib_typeinfo.cpp",
   ]
   configs -= [
     "//build/config/compiler:chromium_code",
     "//build/config/compiler:no_rtti",
     "//build/config/gcc:no_exceptions",
     "//build/config/gcc:symbol_visibility_hidden",
   ]
   configs += [
     "//build/config/compiler:no_chromium_code",
     "//build/config/compiler:rtti",
     "//build/config/gcc:symbol_visibility_default",
     "//buildtools/third_party/libc++:config",
     # Must be after no_chromium_code.
     ":libc++abi_warnings",
   ]
 }