SVGPath object "mutability" cleanup

third_party/WebKit/Source/core/animation/PathSVGInterpolation.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/PathSVGInterpolation.h"
 
 #include "core/svg/SVGPathByteStreamBuilder.h"
 #include "core/svg/SVGPathByteStreamSource.h"
 #include "core/svg/SVGPathElement.h"
@@ skipping 415 matching lines @@
         ++i;
     }
     ASSERT(!endPathSource.hasMoreData());
     ASSERT(i == length);
 
     return adoptRef(new PathSVGInterpolation(startValue.release(), endValue.release(), attribute, pathSegTypes));
 }
 
 PassRefPtrWillBeRawPtr<SVGPropertyBase> PathSVGInterpolation::fromInterpolableValue(const InterpolableValue& value, const Vector<SVGPathSegType>& pathSegTypes)
 {
-    RefPtrWillBeRawPtr<SVGPath> result = SVGPath::create();
+    OwnPtr<SVGPathByteStream> pathByteStream = SVGPathByteStream::create();
     InterpolatedPathSource source(toInterpolableList(value), pathSegTypes);
-    SVGPathByteStreamBuilder builder(result->mutableByteStream());
+    SVGPathByteStreamBuilder builder(*pathByteStream);
     SVGPathParser parser(&source, &builder);
     parser.parsePathDataFromSource(UnalteredParsing, false);
-    return result.release();
+    return SVGPath::create(pathByteStream.release());
 }
 
 PassRefPtrWillBeRawPtr<SVGPropertyBase> PathSVGInterpolation::interpolatedValue(SVGElement&) const
 {
     return fromInterpolableValue(*m_cachedValue, m_pathSegTypes);
 }
 
 }