Bug 44187

Summary:	Extend the layoutTestController to support dumping HostWindow methods to log invalidations
Product:	WebKit	Reporter:	Darin Fisher (:fishd, Google) <fishd>
Component:	Tools / Tests	Assignee:	Darin Fisher (:fishd, Google) <fishd>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	All
OS:	All

Description Darin Fisher (:fishd, Google) 2010-08-18 10:53:04 PDT

Following on from bug 42949, there should be a way to write a layout test
that can verify that the correct invalidation is generated after scrolling
a page containing fixed position elements.

The repaint test framework is not a great option since the actual repainting
done is fairly platform specific.  For example, some platforms will coalesce
invalidations into a smaller set of invalidations.  Or, if scrolling overlaps
with invalidation, some platforms may combine those operations in distinct ways.

Instead, it seems like it would be useful to have a way to log HostWindow methods
like invalidateContentsAndWindow, invalidateContentsForSlowScroll, and scroll.