Add define required for VS2013 ATL to target XP

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 2245 matching lines @@
         ],  # conditions for coverage
       }],  # coverage!=0
       ['OS=="win"', {
         'defines': [
           '__STD_C',
           '_CRT_SECURE_NO_DEPRECATE',
           '_SCL_SECURE_NO_DEPRECATE',
           # This define is required to pull in the new Win8 interfaces from
           # system headers like ShObjIdl.h.
           'NTDDI_VERSION=0x06020000',
+          # This is required for ATL to use XP-safe versions of its functions.
+          '_USING_V110_SDK71_',
         ],
         'include_dirs': [
           '<(DEPTH)/third_party/wtl/include',
         ],
         'conditions': [
           ['win_z7!=0', {
             'msvs_settings': {
               # Generates debug info when win_z7=1
               # even if fastbuild=1 (that makes GenerateDebugInformation false).
               'VCLinkerTool': {
@@ skipping 2424 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',
   },
 }