Use depot_tools toolchain, remove now unneeded code, fix not including path to win sdk tools

build/vs_toolchain.py

 # 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 json
 import os
 import pipes
 import shutil
 import subprocess
 import sys
@@ skipping 64 matching lines @@
     # values there.
     gyp_defines_dict = gyp.NameValueListToDict(gyp.ShlexEnv('GYP_DEFINES'))
     gyp_defines_dict['windows_sdk_path'] = win8sdk
     os.environ['GYP_DEFINES'] = ' '.join('%s=%s' % (k, pipes.quote(str(v)))
         for k, v in gyp_defines_dict.iteritems())
     os.environ['WINDOWSSDKDIR'] = win8sdk
     os.environ['WDK_DIR'] = wdk
     # Include the VS runtime in the PATH in case it's not machine-installed.
     runtime_path = ';'.join(vs2013_runtime_dll_dirs)
     os.environ['PATH'] = runtime_path + ';' + os.environ['PATH']
-    print('Using automatic toolchain in %s (%s edition).' % (
-              toolchain, 'Pro' if version_is_pro else 'Express'))
   return vs2013_runtime_dll_dirs
 
 
 def CopyVsRuntimeDlls(output_dir, runtime_dirs):
   """Copies the VS runtime DLLs from the given |runtime_dirs| to the output
   directory so that even if not system-installed, built binaries are likely to
   be able to run.
 
   This needs to be run after gyp has been run so that the expected target
   output directories are already created.
@@ skipping 31 matching lines @@
     os.makedirs(out_release_nacl64)
   copy_runtime(out_debug,          x86, 'msvc%s120d.dll')
   copy_runtime(out_release,        x86, 'msvc%s120.dll')
   copy_runtime(out_debug_x64,      x64, 'msvc%s120d.dll')
   copy_runtime(out_release_x64,    x64, 'msvc%s120.dll')
   copy_runtime(out_debug_nacl64,   x64, 'msvc%s120d.dll')
   copy_runtime(out_release_nacl64, x64, 'msvc%s120.dll')
 
 
 def main():
+  if len(sys.argv) < 2:
+    print >>sys.stderr, 'Expected either "get_toolchain_dir" or "copy_dlls"'
+    return 1
+  if sys.argv[1] == 'get_toolchain_dir':
+    DownloadVsToolchain()
+    print '["%s", "%s"]' % (
+        os.environ['GYP_MSVS_OVERRIDE_PATH'], os.environ['WINDOWSSDKDIR'])
+  else:
+    print >>sys.stderr, 'TODO: not implemented "%s"' % sys.argv[1]
+    return 1
   return 0
 
+
 if __name__ == '__main__':
   sys.exit(main())