Revert of Allow Windows to use system Vsync for a single window each swap

Revert of Allow Windows to use system Vsync for a single window each swap (patchset #2 id:20001 of https://codereview.chromium.org/708483003/)

Reason for revert:
Possibly introduced regressions into smoothness.tough_scrolling_cases

https://code.google.com/p/chromium/issues/detail?id=431599

Original issue's description:
> Allow Windows to use system Vsync for a single window each swap
>
> This makes the common case (one browser window) smoother, but doesn't
> help multi-window smoothness much.
>
> BUG=422000
>
> Committed: https://crrev.com/3f72599ead7c0ee7922afedf93ffae17f5f45f88
> Cr-Commit-Position: refs/heads/master@{#303074}

TBR=brianderson@chromium.org,jbauman@chromium.org,kbr@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=422000
Committed: https://crrev.com/0d49051cb119a5fad0f8291834fd93d0225f39be
Cr-Commit-Position: refs/heads/master@{#303759}

[bajones, 2014-11-12 00:30:07]

Created Revert of Allow Windows to use system Vsync for a single window each
swap

[commit-bot: I haz the power, 2014-11-12 00:31:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/710393003/1

[commit-bot: I haz the power, 2014-11-12 00:32:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-12 00:33:04]

Patchset 1 (id:??) landed as
https://crrev.com/0d49051cb119a5fad0f8291834fd93d0225f39be
Cr-Commit-Position: refs/heads/master@{#303759}