Introduce isWindowsVistaOrGreater() as replacement of windowsVersion()

This patch is a part of preparation of migrating Win SDK 8.1.

This patch introduces isWindowsVistaOrGreater() as replacement of windowsVersion() to avoid using deprecated Windows API GetVersionEx(), which is deprecated since Win SDK 8.1+, by using new Windows API IsWindowsVistaOrGreater() for Win SDK 8.1 build or VerifyVersionInfo() before Win SDK 8.1.

BUG=n/a
TEST=n/a; no behavior changes

Review URL: https://codereview.chromium.org/39693002

git-svn-id: svn://svn.chromium.org/blink/trunk@160698 bbb929c8-8fbe-4397-9dbb-9b2b20218538