Parser support for >>> (shadow-piercing descendant) combinator.

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 70 matching lines @@
 
 class UseCounter;
 
 class CORE_EXPORT CSSParserContext {
   USING_FAST_MALLOC(CSSParserContext);
 
  public:
   // https://drafts.csswg.org/selectors/#profiles
   enum SelectorProfile { DynamicProfile, StaticProfile };
 
-  CSSParserContext(CSSParserMode, UseCounter*);
+  CSSParserContext(CSSParserMode,
+                   UseCounter*,
+                   SelectorProfile = DynamicProfile);
   // FIXME: We shouldn't need the UseCounter argument as we could infer it from
   // the Document but some callers want to disable use counting (e.g. the
   // WebInspector).
   CSSParserContext(const Document&,
                    UseCounter*,
                    const KURL& baseURL = KURL(),
                    const String& charset = emptyString(),
                    SelectorProfile = DynamicProfile);
   // FIXME: This constructor shouldn't exist if we properly piped the UseCounter
   // through the CSS subsystem. Currently the UseCounter life time is too crazy
@@ skipping 51 matching lines @@
   ContentSecurityPolicyDisposition m_shouldCheckContentSecurityPolicy;
 
   UseCounter* m_useCounter;
 };
 
 CORE_EXPORT const CSSParserContext& strictCSSParserContext();
 
 }  // namespace blink
 
 #endif  // CSSParserMode_h