Change Windows build default to build with Visual Studio 2010.

tools/build.py

Index: tools/build.py
===================================================================
--- tools/build.py	(revision 13701)
+++ tools/build.py	(working copy)
@@ -42,7 +42,11 @@
       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'

[Jennifer Messerly, 2012/10/16 22:07:00]

IIRC, there's an environment variable for Program Files. (type "set" to see the
variables)

Also there's a registry key (and an environment variable?) to detect the VS
install path. That's the canonical way to do it.

[ricow1, 2012/10/18 06:22:04]

John is right, for easy retrieval of this take a look in
build/scripts/slave/compile.py
in the buildbot source

+      '\\IDE')
+  result.add_option("--executable",
+      help='Name of the devenv.com/msbuild executable on Windows (varies for '
+      'different versions of Visual Studio)', default='devenv.com')
   return result
 
 
@@ -262,13 +266,13 @@
           if os.path.exists('dart-%s.gyp' % CurrentDirectoryBaseName()):
             project_file = 'dart-%s.sln' % CurrentDirectoryBaseName()
           if target == 'all':
-            args = [options.devenv + os.sep + 'devenv.com',
+            args = [options.devenv + os.sep + options.executable,
                     '/build',
                     build_config,
                     project_file
                    ]
           else:
-            args = [options.devenv + os.sep + 'devenv.com',
+            args = [options.devenv + os.sep + options.executable,
                     '/build',
                     build_config,
                     '/project',