Revert of Revert of Sync Windows build flags between GYP and GN

build/internal/release_impl_official.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.
 {
   'includes': ['release_defaults.gypi'],
   'defines': ['OFFICIAL_BUILD'],
   'msvs_settings': {
     'VCCLCompilerTool': {
       'InlineFunctionExpansion': '2',
       'EnableIntrinsicFunctions': 'true',
-      'EnableFiberSafeOptimizations': 'true',
       'OmitFramePointers': 'false',
       # The above is not sufficient (http://crbug.com/106711): it
       # simply eliminates an explicit "/Oy", but both /O2 and /Ox
       # perform FPO regardless, so we must explicitly disable.
       # We still want the false setting above to avoid having
       # "/Oy /Oy-" and warnings about overriding.
       'AdditionalOptions': ['/Oy-'],
     },
     'VCLibrarianTool': {
       'AdditionalOptions': [
@@ skipping 11 matching lines @@
       ],
       # The /PROFILE flag causes the linker to add a "FIXUP" debug stream to
       # the generated PDB. According to MSDN documentation, this flag is only
       # available (or perhaps supported) in the Enterprise (team development)
       # version of Visual Studio. If this blocks your official build, simply
       # comment out this line, then  re-run "gclient runhooks".
       'Profile': 'true',
     },
   },
 }