Fix 8.1 sdk detection defines

Fix 8.1 sdk detection defines

Checking the existence of _WIN32_WINNT_WINBLUE is incorrect, rather
we should check that the value of _WIN32_WINNT is the desired value
as that's the level that the headers are exposing.

Also, move #include of windows.h up above check for include of
versionhelpers.h, otherwise the defines are changed mid-file which
causes problems.

Also, fix typo in spelling of "condition".

(Follow up to https://codereview.chromium.org/39693002)

R=yosin@chromium.org, tkent@chromium.org
BUG=311488, 432748
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185390

[scottmg, 2014-11-14 19:10:48]

scottmg@chromium.org changed reviewers:
+ thakis@chromium.org

[scottmg, 2014-11-14 19:11:23]

+thakis due to timezone considerations

[Nico, 2014-11-14 19:15:15]

timezones lgtm

[scottmg, 2014-11-14 19:17:58]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2014-11-14 19:19:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/732673002/40001

[commit-bot: I haz the power, 2014-11-14 20:24:54]

Committed patchset #3 (id:40001) as 185390