Update chrome_rev

buildbot/buildbot_lib.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Native Client 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 optparse
 import os.path
 import shutil
 import subprocess
 import stat
@@ skipping 61 matching lines @@
   context['use_breakpad_tools'] = False
   context['max_jobs'] = 8
   context['scons_args'] = []
 
 
 # Windows-specific environment manipulation
 def SetupWindowsEnvironment(context):
   # Poke around looking for MSVC.  We should do something more principled in
   # the future.
 
+  # NOTE!  This affects only SCons.  The GN build figures out MSVC on its own
+  # and will wind up with a different version than this one (the same version
+  # being used for Chromium builds).
+
   # The name of Program Files can differ, depending on the bittage of Windows.
   program_files = r'c:\Program Files (x86)'
   if not os.path.exists(program_files):
     program_files = r'c:\Program Files'
     if not os.path.exists(program_files):
       raise Exception('Cannot find the Program Files directory!')
 
   # The location of MSVC can differ depending on the version.
   msvc_locs = [
       ('Microsoft Visual Studio 12.0', 'VS120COMNTOOLS', '2013'),
       ('Microsoft Visual Studio 10.0', 'VS100COMNTOOLS', '2010'),
       ('Microsoft Visual Studio 9.0', 'VS90COMNTOOLS', '2008'),
       ('Microsoft Visual Studio 8.0', 'VS80COMNTOOLS', '2005'),
   ]
 
   for dirname, comntools_var, gyp_msvs_version in msvc_locs:
     msvc = os.path.join(program_files, dirname)
-    context.SetEnv('GYP_MSVS_VERSION', gyp_msvs_version)
     if os.path.exists(msvc):
       break
   else:
     # The break statement did not execute.
     raise Exception('Cannot find MSVC!')
 
   # Put MSVC in the path.
   vc = os.path.join(msvc, 'VC')
   comntools = os.path.join(msvc, 'Common7', 'Tools')
   perf = os.path.join(msvc, 'Team Tools', 'Performance Tools')
@@ skipping 540 matching lines @@
   #   Otherwise these go back to the preamble.
   with Step('summary', status):
     if status.ever_failed:
       print 'There were failed stages.'
     else:
       print 'Success.'
     # Display a summary of the build.
     status.DisplayBuildStatus()
 
   sys.exit(status.ReturnValue())