Apply RuleSet changes for active stylesheet changes.

third_party/WebKit/Source/core/dom/StyleEngine.h

Index: third_party/WebKit/Source/core/dom/StyleEngine.h
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.h b/third_party/WebKit/Source/core/dom/StyleEngine.h
index 132c3c1796aa30345f3a844ded4cbf69dee2a157..409ec046e19a0cc45a3fb3f07598883d3a8cbf2b 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.h
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.h
@@ -211,9 +211,8 @@ class CORE_EXPORT StyleEngine final
                                               Element& removedElement,
                                               Element& afterElement);
   void scheduleNthPseudoInvalidations(ContainerNode&);
-  void scheduleInvalidationsForRuleSets(
-      TreeScope&,
-      const HeapVector<Member<const RuleSet>>&);
+  void scheduleInvalidationsForRuleSets(TreeScope&,
+                                        const HeapVector<Member<RuleSet>>&);
 
   unsigned styleForElementCount() const { return m_styleForElementCount; }
   void incStyleForElementCount() { m_styleForElementCount++; }
@@ -271,7 +270,7 @@ class CORE_EXPORT StyleEngine final
   bool shouldSkipInvalidationFor(const Element&) const;
   void scheduleRuleSetInvalidationsForElement(
       Element&,
-      const HeapVector<Member<const RuleSet>>&);
+      const HeapVector<Member<RuleSet>>&);
   void invalidateSlottedElements(HTMLSlotElement&);
 
   Member<Document> m_document;