[Webkit-unassigned] [Bug 123869] New: Fix underflow when animating properties of type 'unsigned short'

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123869

           Summary: Fix underflow when animating properties of type
                    'unsigned short'
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Animations
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: hyatt at apple.com, simon.fraser at apple.com,
                    dino at apple.com, thorton at apple.com


Consider merging https://chromium.googlesource.com/chromium/blink/+/c3f02c2024e41a25e4fb3f5b109118cf8aede7e4

This affects outline-width, -webkit-column-count and -webkit-column-rule-width.

Note that these were intended to be fixed by
https://chromiumcodereview.appspot.com/23287005, but that change only fixed
properties of type 'unsigned'.

Also templatize the simple blendFunc() functions.

Note that animation of -webkit-column-count is currently broken. See
crbug.com/303444.

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