Store [-webkit-]transform-origin as a TransformOrigin.

Source/core/rendering/style/StyleTransformData.cpp

Index: Source/core/rendering/style/StyleTransformData.cpp
diff --git a/Source/core/rendering/style/StyleTransformData.cpp b/Source/core/rendering/style/StyleTransformData.cpp
index 6b91807c38adb377d6be0e1e45b680d00c70c125..8a1cd62e9d8f54ba4ed56a5db8b406b42cba38f9 100644
--- a/Source/core/rendering/style/StyleTransformData.cpp
+++ b/Source/core/rendering/style/StyleTransformData.cpp
@@ -28,24 +28,20 @@ namespace blink {
 
 StyleTransformData::StyleTransformData()
     : m_operations(RenderStyle::initialTransform())
-    , m_x(RenderStyle::initialTransformOriginX())
-    , m_y(RenderStyle::initialTransformOriginY())
-    , m_z(RenderStyle::initialTransformOriginZ())
+    , m_origin(RenderStyle::initialTransformOrigin())
 {
 }
 
 StyleTransformData::StyleTransformData(const StyleTransformData& o)
     : RefCounted<StyleTransformData>()
     , m_operations(o.m_operations)
-    , m_x(o.m_x)
-    , m_y(o.m_y)
-    , m_z(o.m_z)
+    , m_origin(o.m_origin)
 {
 }
 
 bool StyleTransformData::operator==(const StyleTransformData& o) const
 {
-    return m_x == o.m_x && m_y == o.m_y && m_z == o.m_z && m_operations == o.m_operations;
+    return m_origin == o.m_origin && m_operations == o.m_operations;
 }
 
 } // namespace blink