Add gyp_vars to fake context in sdk build script.

native_client_sdk/src/build_tools/buildbot_common.py

 # 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.
 
 """Common utilities for all buildbot scripts that specifically don't rely
 on having a full chromium checkout.
 """
 
 import os
 import subprocess
@@ skipping 62 matching lines @@
     def __getitem__(self, key):
       return self.env[key]
 
     def SetEnv(self, key, value):
       self.env[key] = value
 
     def __setitem__(self, key, value):
       self.env[key] = value
 
   context = FakeContext()
+  context['gyp_vars'] = []
   buildbot_standard.SetupWindowsEnvironment(context)
 
   # buildbot_standard.SetupWindowsEnvironment adds the directory which contains
   # vcvarsall.bat to the path, but not the directory which contains cl.exe,
   # link.exe, etc.
   # Running vcvarsall.bat adds the correct directories to the path, which we
   # extract below.
   process = subprocess.Popen('vcvarsall.bat x86 > NUL && set',
       stdout=subprocess.PIPE, env=context.env, shell=True)
   stdout, _ = process.communicate()
@@ skipping 107 matching lines @@
   # Without shell=True the windows implementation of subprocess.call will not
   # search the PATH for the executable: http://bugs.python.org/issue8557
   shell = getos.GetPlatform() == 'win'
 
   cmd = [GetGsutil(), 'cp', '-a', 'public-read', filename, full_dst]
   Run(cmd, shell=shell, cwd=cwd)
   url = 'https://storage.googleapis.com/%s/%s' % (bucket_path, filename)
   if step_link:
     sys.stdout.flush()
     sys.stderr.write('@@@STEP_LINK@download@%s@@@\n' % url)