Fix Windows XP and Vista taskbar activation issue.

Fix Windows XP and Vista taskbar activation issue.

On Windows XP and Vista, new windows don't indicate activation on the taskbar.
(the window buttons should look "pressed" on launch and new window)
This regression was introduced by http://crrev.com/104051

Limit the original fix for http://crbug.com/90386 to Windows > Vista.

BUG=90386, 123473
TEST=New Chrome window appear "pressed" on the taskbar on Vista and XP. No regressions (especially not of crbug.com/90386)

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=149215

[msw, 2012-07-30 23:54:51]

Hey Ben and Scott, please take a look; thanks!

This fixes http://crbug.com/123473 on XP and Vista, and it doesn't appear to
regress http://crbug.com/90386 (tested Win7 locally and Vista over VNC).

[msw, 2012-07-31 02:58:16]

Cool, I just got to test the fix on PavanV's Vista machine.
It looks good (fixes the new issue w/o regressing the old).

[Ben Goodger (Google), 2012-07-31 15:49:23]

lgtm

[commit-bot: I haz the power, 2012-07-31 16:05:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/msw@chromium.org/10826058/2001

[commit-bot: I haz the power, 2012-07-31 17:47:58]

Change committed as 149215