Implement layoutAndPaintAsync() for WebPagePopupImpl and WebFrameWidgetImpl

Implement layoutAndPaintAsync() for WebPagePopupImpl and WebFrameWidgetImpl

Missing the implementations caused timeouts of layout tests requiring
them.

The timeout of css3/filters/huge-region.html should belong to
crbug.com/458428 instead of crbug.com/484706.

virtual/slimmingpaint/media/video-controls-dont-show-on-focus-when-disabled.html
is crbug.com/485644.

R=enne@chromium.org
TBR=chrishtr@chromium.org
BUG=484706, 458601, 485428, 485501, 485644
TEST=The failing tests of crbug.com/485428

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=195070

[Xianzhu, 2015-05-07 18:00:40]

wangxianzhu@chromium.org changed reviewers:
+ chrishtr@chromium.org, enne@chromium.org

[enne (OOO), 2015-05-07 18:07:07]

lgtm

[Xianzhu, 2015-05-07 18:25:43]

The CQ bit was checked by wangxianzhu@chromium.org to run a CQ dry run

[Xianzhu, 2015-05-07 18:25:44]

The patchset sent to the CQ was uploaded after l-g-t-m from enne@chromium.org
Link to the patchset: https://codereview.chromium.org/1127013005/#ps20001
(title: "It also fixes crbug.com/485501")

[commit-bot: I haz the power, 2015-05-07 18:25:59]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1127013005/20001

[Xianzhu, 2015-05-07 18:49:47]

The CQ bit was unchecked by wangxianzhu@chromium.org

[Xianzhu, 2015-05-07 18:50:34]

The CQ bit was checked by wangxianzhu@chromium.org

[commit-bot: I haz the power, 2015-05-07 18:51:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1127013005/20001

[commit-bot: I haz the power, 2015-05-07 20:12:14]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=195070