Use goma by default on Windows.

build/build_nexe.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.
 
 """NEXE building script
 
 This module will take a set of source files, include paths, library paths, and
 additional arguments, and use them to build.
 """
@@ skipping 386 matching lines @@
           path[len(cygdrive)] + ':' + path[len(cygdrive)+1:])
     elif path.startswith('/libexec/'):
       path = os.path.normpath(os.path.join(self.toolchain, path[1:]))
     return path
 
   def GetGomaConfig(self, gomadir, arch, toolname):
     """Returns a goma config dictionary if goma is available or {}."""
 
     # Start goma support from os/arch/toolname that have been tested.
     # Set NO_NACL_GOMA=true to force to avoid using goma.
-    default_no_nacl_goma = True if pynacl.platform.IsWindows() else False
+    default_no_nacl_goma = False
     if (arch not in ['x86-32', 'x86-64', 'pnacl']
         or toolname not in ['newlib', 'glibc']
         or IsEnvFlagTrue('NO_NACL_GOMA', default=default_no_nacl_goma)
         or IsEnvFlagTrue('GOMA_DISABLED')):
       return {}
 
     goma_config = {}
     gomacc_base = 'gomacc.exe' if pynacl.platform.IsWindows() else 'gomacc'
     # Search order of gomacc:
     # --gomadir command argument -> GOMA_DIR env. -> PATH env.
@@ skipping 567 matching lines @@
     if build is not None:
       build.EmitDeferredLog()
     return 1
   except:
     if build is not None:
       build.EmitDeferredLog()
     raise
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))