[Webkit-unassigned] [Bug 100623] New: [TexMap] Make GraphicsLayerAnimation choose a proper timing function.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=100623

           Summary: [TexMap] Make GraphicsLayerAnimation choose a proper
                    timing function.
           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


Previously, GraphicsLayerAnimation choosed a timing function in the wrong way.
Other GraphicsLayers choose a timing function in the similar way to
GraphicsLayerCA::timingFunctionForAnimationValue(). The way consists of the
following steps.
1. Try to query the timing function of the current keyframe animation value.
2. If the timing function of #1 is null, try to query the timing function of Animation.
3. If the timing function of #2 is null, return CubicBezierTimingFunction::defaultTimingFunction().

This patch makes GraphicsLayerAnimation choose a timing function in the same way
to others.

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