[Webkit-unassigned] [Bug 108922] New: Coordinated Graphics: Make CoordinatedGraphicsScene not know contents size.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=108922

           Summary: Coordinated Graphics: Make CoordinatedGraphicsScene
                    not know contents size.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


Currently, CoordinatedGraphicsScene has two methods to know contents size:
setContentsSize() and setVisibleContentsRect(). Contents size is used when
adjusting a scroll position, but adjustment is not needed because
PageViewportController already adjusts a scroll position. So this patch makes
CoordinatedGraphicsScene not know contents size.

In addition, now DrawingAreaProxy::coordinatedLayerTreeHostProxy() is only used
to get CoordinatedGraphicsScene.

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