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

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 2868 matching lines @@
             'msvs_settings': {
               'VCCLCompilerTool': {
                 # Set WarnAsError to false to disable this setting for most
                 # projects so that compilation continues.
                 'WarnAsError': 'false',
                 # When win_analyze is specified add the /analyze switch.
                 # Also add /WX- to force-disable WarnAsError for projects that
                 # override WarnAsError.
                 # Also, disable various noisy warnings that have low value.
                 'AdditionalOptions': [
-                  '/analyze',
-                  '/WX-',
+                  '/analyze:WX-',
                   '/wd6011',  # Dereferencing NULL pointer
                   '/wd6312',  # Possible infinite loop: use of the constant
                     # EXCEPTION_CONTINUE_EXECUTION in the exception-filter
                   '/wd6326',  # Potential comparison of constant with constant
                   '/wd28159', # Consider using 'GetTickCount64'
                   '/wd28204', # Inconsistent SAL annotations
                   '/wd28251', # Inconsistent SAL annotations
                   '/wd28252', # Inconsistent SAL annotations
                   '/wd28253', # Inconsistent SAL annotations
                   '/wd28196', # The precondition is not satisfied
@@ skipping 3296 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }