StartPage/EndPage from spooling code.

StartPage/EndPage from spooling code. Calling this from metafiles unreliable. For example it's not played if for empty page metafiles.
Removed multipage support from windows metafile. We never use that, but it cause issues with empty files.

BUG=412690
Committed: https://crrev.com/71c46df98f27676b71a5f6773855adc4a2d3eba8
Cr-Commit-Position: refs/heads/master@{#296337}

[Vitaly Buka (NO REVIEWS), 2014-09-24 01:20:00]

vitalybuka@chromium.org changed reviewers:
+ gene@chromium.org

[gene, 2014-09-24 01:21:20]

lgtm

[Vitaly Buka (NO REVIEWS), 2014-09-24 02:03:09]

The CQ bit was checked by vitalybuka@chromium.org

[commit-bot: I haz the power, 2014-09-24 02:04:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/599733002/20001

[commit-bot: I haz the power, 2014-09-24 03:20:24]

Committed patchset #2 (id:20001) as 9897cae50ac366fa861275bc77fc941eaf2e76b7

[commit-bot: I haz the power, 2014-09-24 03:20:55]

Patchset 2 (id:??) landed as
https://crrev.com/71c46df98f27676b71a5f6773855adc4a2d3eba8
Cr-Commit-Position: refs/heads/master@{#296337}