Added CSSPropertyShapeUtils which holds shape parsing methods.

third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.h

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.h
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.h b/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.h
new file mode 100644
index 0000000000000000000000000000000000000000..99fb1cbc5ad21d8e18af4f7db0a5f378200ef3be
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyShapeUtils.h
@@ -0,0 +1,31 @@
+// Copyright 2017 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.
+
+#ifndef CSSPropertyShapeUtils_h
+#define CSSPropertyShapeUtils_h
+
+#include "core/css/parser/CSSParserMode.h"
+#include "wtf/Allocator.h"
+
+namespace blink {
+
+class CSSValue;
+class CSSParserContext;
+class CSSParserTokenRange;
+
+class CSSPropertyShapeUtils {
+  STATIC_ONLY(CSSPropertyShapeUtils);
+
+  static CSSValue* consumeBasicShape(CSSParserTokenRange&,
+                                     const CSSParserContext*);
+  static bool consumeRadii(CSSValue* horizontalRadii[4],
+                           CSSValue* verticalRadii[4],
+                           CSSParserTokenRange&,
+                           CSSParserMode,
+                           bool useLegacyParsing);
+};
+
+}  // namespace blink
+
+#endif  // CSSPropertyShapeUtils_h