Change Windows build default to build with Visual Studio 2010.

tools/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. 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
 import shutil
@@ skipping 24 matching lines @@
   result.add_option("--os",
     help='Target OSs (comma-separated).',
     metavar='[all,host,android]',
     default='host')
   result.add_option("-j",
       help='The number of parallel jobs to run.',
       metavar=HOST_CPUS,
       default=str(HOST_CPUS))
   result.add_option("--devenv",
       help='Path containing devenv.com on Windows',
-      default='C:\\Program Files (x86)\\Microsoft Visual Studio 9.0\\Common7\\IDE')
+      default='C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\Common7\\IDE')

[Bob Nystrom, 2012/10/15 19:01:38]

Long line. Also, how about including the executable name here too instead of
hard-coding that later so that you can pass in VCExpress.exe?

   return result
 
 
 def ProcessOsOption(os):
   if os == 'host':
     return HOST_OS
   return os
 
 
 def ProcessOptions(options, args):
@@ skipping 260 matching lines @@
         process.wait()
         if process.returncode != 0:
           print "BUILD FAILED"
           return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(Main())