CSS Transforms: Implement perspective-origin

Source/core/animation/css/CSSAnimations.cpp

Index: Source/core/animation/css/CSSAnimations.cpp
diff --git a/Source/core/animation/css/CSSAnimations.cpp b/Source/core/animation/css/CSSAnimations.cpp
index 246c4b9e713945f735651574315515af87f624e3..9fdc5fade12fc66905f43aa5d5992d02a9dc9b8c 100644
--- a/Source/core/animation/css/CSSAnimations.cpp
+++ b/Source/core/animation/css/CSSAnimations.cpp
@@ -79,6 +79,11 @@ CSSPropertyID propertyForAnimation(CSSPropertyID property)
         return CSSPropertyPerspective;
     case CSSPropertyWebkitTransform:
         return CSSPropertyTransform;
+    case CSSPropertyWebkitPerspectiveOriginX:
+    case CSSPropertyWebkitPerspectiveOriginY:
+        if (RuntimeEnabledFeatures::cssTransformsUnprefixedEnabled())
+            return CSSPropertyPerspectiveOrigin;
+        break;
     case CSSPropertyWebkitTransformOriginX:
     case CSSPropertyWebkitTransformOriginY:
     case CSSPropertyWebkitTransformOriginZ:
@@ -782,7 +787,6 @@ void CSSAnimations::TransitionEventDelegate::onEventCondition(const TimedItem* t
     }
 }
 
-
 bool CSSAnimations::isAnimatableProperty(CSSPropertyID property)
 {
     switch (property) {
@@ -880,8 +884,6 @@ bool CSSAnimations::isAnimatableProperty(CSSPropertyID property)
     case CSSPropertyWebkitMaskPositionY:
     case CSSPropertyWebkitMaskSize:
     case CSSPropertyPerspective:
-    case CSSPropertyWebkitPerspectiveOriginX:
-    case CSSPropertyWebkitPerspectiveOriginY:
     case CSSPropertyShapeOutside:
     case CSSPropertyShapeMargin:
     case CSSPropertyShapeImageThreshold:
@@ -893,8 +895,11 @@ bool CSSAnimations::isAnimatableProperty(CSSPropertyID property)
     case CSSPropertyZIndex:
     case CSSPropertyZoom:
         return true;
+    case CSSPropertyPerspectiveOrigin:
     case CSSPropertyTransformOrigin:
         return RuntimeEnabledFeatures::cssTransformsUnprefixedEnabled();
+    case CSSPropertyWebkitPerspectiveOriginX:
+    case CSSPropertyWebkitPerspectiveOriginY:
     case CSSPropertyWebkitTransformOriginX:
     case CSSPropertyWebkitTransformOriginY:
     case CSSPropertyWebkitTransformOriginZ: