Update animation when changes in animation keyframes are detected.

Source/core/animation/Timing.h

Index: Source/core/animation/Timing.h
diff --git a/Source/core/animation/Timing.h b/Source/core/animation/Timing.h
index 5c22403965eacca40ed48c39bf1b98579988ac9e..e51a05abcf795b8ab92b815dc4a008d5e7ebbfbb 100644
--- a/Source/core/animation/Timing.h
+++ b/Source/core/animation/Timing.h
@@ -93,7 +93,8 @@ struct Timing {
         return startDelay == other.startDelay && endDelay == other.endDelay
             && fillMode == other.fillMode && iterationStart == other.iterationStart
             && iterationCount == other.iterationCount && iterationDuration == other.iterationDuration
-            && playbackRate == other.playbackRate && direction == other.direction;
+            && playbackRate == other.playbackRate && direction == other.direction
+            && (((!timingFunction || !other.timingFunction) && timingFunction == other.timingFunction) || *timingFunction == *other.timingFunction);
     }
 
     bool operator!=(const Timing &other) const