Add code to detect Visual Studio 2010.
Add code to detect Visual Studio 2010.

BUG=96
TEST=None

Review URL: http://codereview.chromium.org/6233002
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google