Make all nss targets build on Win64

nss.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'conditions': [
       ['OS=="ios"', {
         'exclude_nss_root_certs%': 0,
         'exclude_nss_libpkix%': 0,
@@ skipping 1014 matching lines @@
           'mozilla/security/nss/lib/freebl/ecl',
           'mozilla/security/nss/lib/nss',
           'mozilla/security/nss/lib/pk11wrap',
           'mozilla/security/nss/lib/pkcs7',
           'mozilla/security/nss/lib/pki',
           'mozilla/security/nss/lib/smime',
           'mozilla/security/nss/lib/softoken',
           'mozilla/security/nss/lib/util',
         ],
       },
-      'msvs_disabled_warnings': [4018, 4101],
+      'msvs_disabled_warnings': [4018, 4101, 4267, ],
       'conditions': [
         ['exclude_nss_root_certs==1', {
           'defines': [
             'NSS_DISABLE_ROOT_CERTS',
           ],
         }],
         ['exclude_nss_libpkix==1', {
           'defines': [
             'NSS_DISABLE_LIBPKIX',
           ],
@@ skipping 70 matching lines @@
                 'NSS_X86_OR_X64',
                 'NSS_X86',
                 '_X86_',
                 'MP_ASSEMBLY_MULTIPLY',
                 'MP_ASSEMBLY_SQUARE',
                 'MP_ASSEMBLY_DIV_2DX1D',
                 'MP_USE_UINT_DIGIT',
                 'MP_NO_MP_WORD',
               ],
             }],
+            ['target_arch=="x64"', {
+              'defines': [
+                'NSS_USE_64',
+                'NSS_X86_OR_X64',
+                'NSS_X64',
+                'WIN64',
+              ],
+              'sources!': [
+                'mozilla/security/nss/lib/freebl/mpi/mpi_amd64.c',
+                'mozilla/security/nss/lib/freebl/mpi/mpi_x86_asm.c',
+              ],
+            }],
           ],
         }],
         ['clang==1', {
           'xcode_settings': {
             'WARNING_CFLAGS': [
               # nss doesn't explicitly cast between different enum types.
               '-Wno-conversion',
               # nss passes "const char*" through "void*".
               '-Wno-incompatible-pointer-types',
               # nss prefers `a && b || c` over `(a && b) || c`.
               '-Wno-logical-op-parentheses',
               # nss doesn't use exhaustive switches on enums
               '-Wno-switch',
               # nss has some `unsigned < 0` checks.
               '-Wno-tautological-compare',
             ],
           },
           'cflags': [
             '-Wno-conversion',
             '-Wno-incompatible-pointer-types',
             '-Wno-logical-op-parentheses',
             '-Wno-switch',
             '-Wno-tautological-compare',
           ],
         }],
       ],
     },
   ],
 }