SVGPath object "mutability" cleanup

third_party/WebKit/Source/core/svg/SVGPath.h

Index: third_party/WebKit/Source/core/svg/SVGPath.h
diff --git a/third_party/WebKit/Source/core/svg/SVGPath.h b/third_party/WebKit/Source/core/svg/SVGPath.h
index 781f6d51952be7a6f505f6f6b288958cc84fc063..040d124bc985e2bd243344da4accf1e4d99d6404 100644
--- a/third_party/WebKit/Source/core/svg/SVGPath.h
+++ b/third_party/WebKit/Source/core/svg/SVGPath.h
@@ -47,13 +47,16 @@ public:
     {
         return adoptRefWillBeNoop(new SVGPath());
     }
+    static PassRefPtrWillBeRawPtr<SVGPath> create(PassOwnPtr<SVGPathByteStream> pathByteStream)
+    {
+        return adoptRefWillBeNoop(new SVGPath(pathByteStream));
+    }
 
     ~SVGPath() override;
 
     const Path& path() const;
 
     const SVGPathByteStream& byteStream() const;
-    SVGPathByteStream& mutableByteStream();
 
     // SVGPropertyBase:
     PassRefPtrWillBeRawPtr<SVGPath> clone() const;
@@ -73,6 +76,7 @@ private:
 
     SVGPathByteStream& ensureByteStream();
     void byteStreamWillChange();
+    void setValueAsByteStream(PassOwnPtr<SVGPathByteStream>);
 
     OwnPtr<SVGPathByteStream> m_byteStream;
     mutable OwnPtr<Path> m_cachedPath;