Use -fasan together with -faddress-sanitizer in nacl.gypi as well.

chrome/nacl.gypi

 # Copyright (c) 2011 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.
 
 {
   'target_defaults': {
     'variables': {
       'nacl_target': 0,
     },
     'target_conditions': [
@@ skipping 271 matching lines @@
                 # We don't want to compile it PIC (or its cousin PIE), because
                 # it goes at an absolute address anyway, and because any kind
                 # of PIC complicates life for the x86-32 assembly code.  We
                 # append -fno-* flags here instead of using a 'cflags!' stanza
                 # to remove -f* flags, just in case some system's compiler
                 # defaults to using PIC for everything.
                 '-fno-pic', '-fno-PIC',
                 '-fno-pie', '-fno-PIE',
               ],
               'cflags!': [
+                # TODO(glider): -fasan is deprecated.
                 '-fasan',
+                '-faddress-sanitizer',
                 '-w',
               ],
               'conditions': [
                 ['clang==1', {
                   'cflags': [
                     # Prevent llvm-opt from replacing my_bzero with a call
                     # to memset
                     '-ffreestanding',
                   ],
                 }],
@@ skipping 102 matching lines @@
               'target_name': 'nacl_win64',
               'type': 'none',
               'sources': [],
             },
           ],
         }],
       ],
     }],
   ],
 }