Turn on warnings as errors for (most) third_party code on Windows

tools/memory_watcher/memory_watcher.gyp

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'memory_watcher',
       'type': 'shared_library',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../ui/ui.gyp:ui',
       ],
       'defines': [
         'BUILD_MEMORY_WATCHER',
       ],
       'include_dirs': [
         '../..',
         '<(DEPTH)/third_party/wtl/include',
       ],
+      # "/GS can not protect parameters and local variables from local buffer
+      # overrun because optimizations are disabled in function". Nothing to be
+      # done about this warning.
+      'msvs_disabled_warnings': [ 4748 ],
       'sources': [
         'call_stack.cc',
         'call_stack.h',
         'dllmain.cc',
         'hotkey.h',
         'ia32_modrm_map.cc',
         'ia32_opcode_map.cc',
         'memory_hook.cc',
         'memory_hook.h',
         'memory_watcher.cc',
         'memory_watcher.h',
         'mini_disassembler.cc',
         'preamble_patcher.cc',
         'preamble_patcher.h',
         'preamble_patcher_with_stub.cc',
       ],
     },
   ],
 }