[Webkit-unassigned] [Bug 76717] New: WebScrollbar implementation doesn't validate SetValue calls against document size

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=76717

           Summary: WebScrollbar implementation doesn't validate SetValue
                    calls against document size
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: raymes at google.com


Chromium WebScrollbarImpl's setValue() accepts values which are outside the document size and setDocumentSize() accepts values even when they are lower than the
current scroll position. According to brettw's comment on the chromium.org bug (http://code.google.com/p/chromium/issues/detail?id=89367), the following should be the correct behavior:
-If setValue() is passed a value > documentSize, then nothing should happen.
-If setDocumentSize() is passed a size < the scroll position, then the scroll position should be capped at the document size.

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