[Webkit-unassigned] [Bug 66597] New: [skia] BitmapImageSingleFrameSkia returns true to isBitmapImage() but does not inherit from BitmapImage

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66597

           Summary: [skia] BitmapImageSingleFrameSkia returns true to
                    isBitmapImage() but does not inherit from BitmapImage
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jamesr at chromium.org
                CC: brettw at chromium.org, reed at google.com,
                    senorblanco at chromium.org, jamesr at chromium.org,
                    tomhudson at google.com


This leads to bugs since code in WebKit typically assumes that if a function returns true to isFoo() it is safe to static_cast<Foo*> and call functions.  See https://bugs.webkit.org/show_bug.cgi?id=65063 for an example of where this bug caused real crashes.

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