Add unit test for SVG path parsing

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

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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  */
 
 #ifndef SVGPathStringBuilder_h
 #define SVGPathStringBuilder_h
 
+#include "core/CoreExport.h"
 #include "core/svg/SVGPathConsumer.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
-class SVGPathStringBuilder final : public SVGPathConsumer {
+class CORE_EXPORT SVGPathStringBuilder final : public SVGPathConsumer {
 public:
     String result();
 
 private:
     void incrementPathSegmentCount() override { }
     bool continueConsuming() override { return true; }
 
     void emitSegment(const PathSegmentData&) override;
 
     StringBuilder m_stringBuilder;
 };
 
 } // namespace blink
 
 #endif // SVGPathStringBuilder_h