Add deprecation message for -webkit-background-composite

third_party/WebKit/Source/core/css/parser/CSSParserMode.h

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
@@ skipping 84 matching lines @@
     CSSParserContext(const CSSParserContext&, UseCounter*);
 
     bool operator==(const CSSParserContext&) const;
     bool operator!=(const CSSParserContext& other) const { return !(*this == other); }
 
     CSSParserMode mode() const { return m_mode; }
     const KURL& baseURL() const { return m_baseURL; }
     const String& charset() const { return m_charset; }
     const Referrer& referrer() const { return m_referrer; }
     bool isHTMLDocument() const { return m_isHTMLDocument; }
-
     // This quirk is to maintain compatibility with Android apps built on
     // the Android SDK prior to and including version 18. Presumably, this
     // can be removed any time after 2015. See http://crbug.com/277157.
     bool useLegacyBackgroundSizeShorthandBehavior() const { return m_useLegacyBackgroundSizeShorthandBehavior; }
 
     // FIXME: These setters shouldn't exist, however the current lifetime of CSSParserContext
     // is not well understood and thus we sometimes need to override these fields.
     void setMode(CSSParserMode mode) { m_mode = mode; }
     void setBaseURL(const KURL& baseURL) { m_baseURL = baseURL; }
     void setCharset(const String& charset) { m_charset = charset; }
@@ skipping 17 matching lines @@
     ContentSecurityPolicyDisposition m_shouldCheckContentSecurityPolicy;
 
     UseCounter* m_useCounter;
 };
 
 CORE_EXPORT const CSSParserContext& strictCSSParserContext();
 
 };
 
 #endif // CSSParserMode_h