Fix crash when removing stylesheets from shadow tree.

Source/core/css/invalidation/StyleSheetInvalidationAnalysis.h

 /*
  * 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 disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/Vector.h"
 #include "wtf/text/StringImpl.h"
 
 namespace blink {
 
 class Document;
 class Node;
 class StyleSheetContents;
+class TreeScope;
 
 class StyleSheetInvalidationAnalysis {
     STACK_ALLOCATED();
 public:
-    StyleSheetInvalidationAnalysis(const WillBeHeapVector<RawPtrWillBeMember<StyleSheetContents>>&);
+    StyleSheetInvalidationAnalysis(const TreeScope&, const WillBeHeapVector<RawPtrWillBeMember<StyleSheetContents>>&);
 
     bool dirtiesAllStyle() const { return m_dirtiesAllStyle; }
-    void invalidateStyle(Document&);
+    void invalidateStyle();
 
 private:
 
     void analyzeStyleSheet(StyleSheetContents*);
 
-    bool m_dirtiesAllStyle;
+    const TreeScope& m_treeScope;
     HashSet<StringImpl*> m_idScopes;
     HashSet<StringImpl*> m_classScopes;
-    WillBeHeapVector<RawPtrWillBeMember<Node>, 8> m_scopingNodes;
+
+    bool m_dirtiesAllStyle = false;
+    bool m_hasDistributedRules = false;
 };
 
 }
 
 #endif