Remove default args to several PageWidgetDelegate members.

Remove default args to several PageWidgetDelegate members.

No one passes the correct local root here yet; eventually, something....

BUG=411993
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182705

[dcheng, 2014-09-25 17:13:30]

dcheng@chromium.org changed reviewers:
+ japhet@chromium.org

[Nate Chapin, 2014-09-25 17:22:10]

LGTM

[kenrb, 2014-09-25 17:25:21]

kenrb@chromium.org changed reviewers:
+ kenrb@chromium.org

[kenrb, 2014-09-25 17:25:22]

Thanks for cleaning this up Daniel. I will fix WebViewImpl in the
not-too-distant future, where a lot of that code will move out and into the new
class I am making, WebFrameWidget, which uses local roots exclusively. I don't
know about WebPagePopupImpl, because it is still a question in my mind about how
that works in a site isolated world.

[dcheng, 2014-09-25 18:59:10]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-09-25 18:59:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/603883002/20001

[commit-bot: I haz the power, 2014-09-25 19:04:09]

Committed patchset #2 (id:20001) as 182705

[dcheng, 2014-09-25 22:05:00]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/600823005/ by dcheng@chromium.org.

The reason for reverting is: Broke several cross-site iframe tests..