Add a buildflag to use the handle verifier in a per module mode.

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 1623 matching lines @@
       }, {
         'binutils_version%': 0,
       }],
       ['OS=="win" and "<!pymod_do_main(dir_exists <(directx_sdk_default_path))"=="True"', {
         'directx_sdk_path%': '<(directx_sdk_default_path)',
       }, {
         'directx_sdk_path%': '$(DXSDK_DIR)',
       }],
       ['OS=="win"', {
         'windows_driver_kit_path%': '$(WDK_DIR)',
+        'enable_handle_verifier%': 1,
       }],
       ['os_posix==1 and OS!="mac" and OS!="ios"', {
         'conditions': [
           ['target_arch=="mipsel" or target_arch=="mips64el"', {
             'werror%': '',
             'disable_nacl%': 1,
             'nacl_untrusted_build%': 0,
             'use_allocator%': 'none',
           }],
           # Use a 64-bit linker to avoid running out of address space. The
@@ skipping 4658 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',
   },
 }