CSS Motion Path: animate offset-anchor and offset-position

third_party/WebKit/Source/core/css/CSSProperties.in

Index: third_party/WebKit/Source/core/css/CSSProperties.in
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.in b/third_party/WebKit/Source/core/css/CSSProperties.in
index 0693924678d83ff6931a8c2f62a1a30597e5f79c..44ba9814fca52e082310fc9200090b09dd77a21c 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.in
+++ b/third_party/WebKit/Source/core/css/CSSProperties.in
@@ -260,10 +260,10 @@ motion-path alias_for=offset-path
 motion-rotation alias_for=offset-rotation
 object-fit type_name=ObjectFit
 object-position interpolable, converter=convertPosition
-offset-anchor runtime_flag=CSSOffsetPositionAnchor, converter=convertPositionOrAuto
+offset-anchor runtime_flag=CSSOffsetPositionAnchor, interpolable, converter=convertPositionOrAuto
 offset-distance interpolable, converter=convertLength
 offset-path converter=convertPathOrNone
-offset-position runtime_flag=CSSOffsetPositionAnchor, converter=convertPositionOrAuto
+offset-position runtime_flag=CSSOffsetPositionAnchor, interpolable, converter=convertPositionOrAuto
 offset-rotation interpolable, converter=convertOffsetRotation
 opacity interpolable, type_name=float
 order type_name=int