Added CSSPropertyDescriptor.h.tmpl to generate CSSPropertyDescriptor.h.

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

-// Copyright 2016 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 "core/CSSPropertyNames.h"
-
-namespace blink {
-
-class CSSValue;
-class CSSParserTokenRange;
-class CSSParserContext;
-
-// Stores function pointers matching those declared in CSSPropertyAPI.
-struct CSSPropertyDescriptor {
-  const CSSValue* (*parseSingleValue)(CSSParserTokenRange&,
-                                      const CSSParserContext*);
-  bool (*parseShorthand)(bool, CSSParserTokenRange&, const CSSParserContext*);
-
-  // Returns the corresponding CSSPropertyDescriptor for a given CSSPropertyID.
-  // Use this function to access the API for a property. Returns a descriptor
-  // with isValid set to false if no descriptor exists for this ID.
-  static const CSSPropertyDescriptor& get(CSSPropertyID);
-};
-
-}  // namespace blink