Merge 119548 - Special layout handler should be done on top frame being printed.

Merge 119548 - Special layout handler should be done on top frame being printed.
https://bugs.webkit.org/show_bug.cgi?id=88201

Merge approved at http://crbug.com/109412. See also http://crbug.com/135563

Patch by Vitaly Buka <vitalybuka@chromium.org>; on 2012-06-05
Reviewed by Brady Eidson.

No new tests. Root case is already covered by tests.
Case described in the issue can be reproduced only by direct call
to Frame::setPrinting of subframe. Probably it's not possible with
layout tests.

* page/Frame.cpp:
(WebCore::Frame::setPrinting):
Use shouldUsePrintingLayout to choose proper version of forceLayout().
(WebCore::Frame::shouldUsePrintingLayout):
Checks if current frame is the top frame being printed.
* rendering/RenderView.cpp:
(WebCore::RenderView::shouldUsePrintingLayout): Forward to Frame.


TBR=darin@apple.com
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=121786