Use /analyze:WX- instead of /WX- - avoids 3925 D9025 warnings.

third_party/libexif/libexif.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 == "linux" and chromeos==0', {
         'use_system_libexif%': 1,
       }, {  # OS != "linux" and chromeos==0
@@ skipping 88 matching lines @@
                 4018, # size/unsigned mismatch
                 4267, # size_t -> ExifLong truncation on amd64
               ],
               # As of VS 2013 Update 3, building this project with /analyze hits
               # an internal compiler error on exif-entry.c. This halts the build
               # and prevents subsequent analysis. Therefore, /analyze is
               # disabled for this project. See this bug for details:
               # https://connect.microsoft.com/VisualStudio/feedback/details/1014689/internal-compiler-error
               'msvs_settings': {
                 'VCCLCompilerTool': {
-                  'AdditionalOptions!': [ '/analyze' ]
+                  'AdditionalOptions!': [ '/analyze:WX-' ]
                 },
               },
             }],
           ],
         },
       ],
     }, { # 'use_system_libexif!=0
       'targets': [
         {
           'target_name': 'libexif',
           'type': 'none',
           'direct_dependent_settings': {
             'cflags': [
                 '<!@(<(pkg-config) --cflags libexif)',
             ],
             'defines': [
               'USE_SYSTEM_LIBEXIF',
             ],
           },
         }
       ],
     }],
   ]
 }