[Webkit-unassigned] [Bug 44187] New: Extend the layoutTestController to support dumping HostWindow methods to log invalidations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=44187

           Summary: Extend the layoutTestController to support dumping
                    HostWindow methods to log invalidations
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fishd at chromium.org


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.

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