Bring back VERSION_SERVER_2003 to distinguish Server 2003 and XP Pro x64 from regular XP.

BUG=135388
TEST=run chrome on Server 2003 SP2 x86.
TBR=estade@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10701125

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@146054 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed