[infra] Remove dependency on gyp

build/vs_toolchain.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 import glob
 import json
 import os
 import pipes
 import platform
 import shutil
 import stat
 import subprocess
 import sys
 
 
 script_dir = os.path.dirname(os.path.realpath(__file__))
 chrome_src = os.path.abspath(os.path.join(script_dir, os.pardir))
 SRC_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-sys.path.insert(1, os.path.join(chrome_src, 'tools'))
-sys.path.insert(0, os.path.join(chrome_src, 'third_party', 'gyp', 'pylib'))
+sys.path.insert(0, os.path.join(chrome_src, 'tools'))
 json_data_file = os.path.join(script_dir, 'win_toolchain.json')
 
 
-import gyp
-
-
 # Use MSVS2015 as the default toolchain.
 CURRENT_DEFAULT_TOOLCHAIN_VERSION = '2015'
 
 
 def SetEnvironmentAndGetRuntimeDllDirs():
   """Sets up os.environ to use the depot_tools VS toolchain with gyp, and
   returns the location of the VS runtime DLLs so they can be copied into
   the output directory after gyp generation.
 
   Return value is [x64path, x86path] or None
@@ skipping 16 matching lines @@
     if not win_sdk:
       win_sdk = toolchain_data['win8sdk']
     wdk = toolchain_data['wdk']
     # TODO(scottmg): The order unfortunately matters in these. They should be
     # split into separate keys for x86 and x64. (See CopyVsRuntimeDlls call
     # below). http://crbug.com/345992
     vs_runtime_dll_dirs = toolchain_data['runtime_dirs']
 
     os.environ['GYP_MSVS_OVERRIDE_PATH'] = toolchain
     os.environ['GYP_MSVS_VERSION'] = version
-    # We need to make sure windows_sdk_path is set to the automated
-    # toolchain values in GYP_DEFINES, but don't want to override any
-    # otheroptions.express
-    # values there.
-    gyp_defines_dict = gyp.NameValueListToDict(gyp.ShlexEnv('GYP_DEFINES'))
-    gyp_defines_dict['windows_sdk_path'] = win_sdk
-    os.environ['GYP_DEFINES'] = ' '.join('%s=%s' % (k, pipes.quote(str(v)))
-        for k, v in gyp_defines_dict.iteritems())
     os.environ['WINDOWSSDKDIR'] = win_sdk
     os.environ['WDK_DIR'] = wdk
     # Include the VS runtime in the PATH in case it's not machine-installed.
     runtime_path = os.path.pathsep.join(vs_runtime_dll_dirs)
     os.environ['PATH'] = runtime_path + os.path.pathsep + os.environ['PATH']
   elif sys.platform == 'win32' and not depot_tools_win_toolchain:
     if not 'GYP_MSVS_OVERRIDE_PATH' in os.environ:
       os.environ['GYP_MSVS_OVERRIDE_PATH'] = DetectVisualStudioPath()
     if not 'GYP_MSVS_VERSION' in os.environ:
       os.environ['GYP_MSVS_VERSION'] = GetVisualStudioVersion()
@@ skipping 314 matching lines @@
       'copy_dlls': CopyDlls,
   }
   if len(sys.argv) < 2 or sys.argv[1] not in commands:
     print >>sys.stderr, 'Expected one of: %s' % ', '.join(commands)
     return 1
   return commands[sys.argv[1]](*sys.argv[2:])
 
 
 if __name__ == '__main__':
   sys.exit(main())