Apply RuleSet changes for active stylesheet changes.

third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h

Index: third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h
diff --git a/third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h b/third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h
index 8d3cf01c05e1b123fa3fc8ddd3321889d3ae2d92..221ca1da7712f7d5096a569d90f01fa7709e1e98 100644
--- a/third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h
+++ b/third_party/WebKit/Source/core/css/resolver/ScopedStyleResolver.h
@@ -28,6 +28,7 @@
 #ifndef ScopedStyleResolver_h
 #define ScopedStyleResolver_h
 
+#include "core/css/ActiveStyleSheets.h"
 #include "core/css/ElementRuleCollector.h"
 #include "core/css/RuleSet.h"
 #include "core/dom/TreeScope.h"
@@ -56,6 +57,7 @@ class ScopedStyleResolver final : public GarbageCollected<ScopedStyleResolver> {
       const StringImpl* animationName);
 
   void appendCSSStyleSheet(CSSStyleSheet&, const MediaQueryEvaluator&);
+  void appendActiveStyleSheets(unsigned index, const ActiveStyleSheetVector&);
   void collectMatchingAuthorRules(ElementRuleCollector&,
                                   CascadeOrder = ignoreCascadeOrder);
   void collectMatchingShadowHostRules(ElementRuleCollector&,
@@ -72,6 +74,7 @@ class ScopedStyleResolver final : public GarbageCollected<ScopedStyleResolver> {
   bool hasDeepOrShadowSelector() const { return m_hasDeepOrShadowSelector; }
   void setHasUnresolvedKeyframesRule() { m_hasUnresolvedKeyframesRule = true; }
   static void keyframesRulesAdded(const TreeScope&);
+  static ContainerNode& invalidationRootForTreeScope(const TreeScope&);
 
   DECLARE_TRACE();