Move CSSRuleList to the garbage collected heap

Source/core/dom/TreeScopeStyleSheetCollection.cpp

Index: Source/core/dom/TreeScopeStyleSheetCollection.cpp
diff --git a/Source/core/dom/TreeScopeStyleSheetCollection.cpp b/Source/core/dom/TreeScopeStyleSheetCollection.cpp
index 0f66be41ea3c24c0e41a30495d6fb1445e1ddd86..c175081209631bc6c7366a78095babacf1cf3863 100644
--- a/Source/core/dom/TreeScopeStyleSheetCollection.cpp
+++ b/Source/core/dom/TreeScopeStyleSheetCollection.cpp
@@ -75,7 +75,7 @@ void TreeScopeStyleSheetCollection::removeStyleSheetCandidateNode(Node* node, Co
         m_scopingNodesForStyleScoped.remove(scopingNode);
 }
 
-TreeScopeStyleSheetCollection::StyleResolverUpdateType TreeScopeStyleSheetCollection::compareStyleSheets(const Vector<RefPtr<CSSStyleSheet> >& oldStyleSheets, const Vector<RefPtr<CSSStyleSheet> >& newStylesheets, WillBeHeapVector<RawPtrWillBeMember<StyleSheetContents> >& addedSheets)
+TreeScopeStyleSheetCollection::StyleResolverUpdateType TreeScopeStyleSheetCollection::compareStyleSheets(const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& oldStyleSheets, const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& newStylesheets, WillBeHeapVector<RawPtrWillBeMember<StyleSheetContents> >& addedSheets)
 {
     unsigned newStyleSheetCount = newStylesheets.size();
     unsigned oldStyleSheetCount = oldStyleSheets.size();
@@ -104,7 +104,7 @@ TreeScopeStyleSheetCollection::StyleResolverUpdateType TreeScopeStyleSheetCollec
     return hasInsertions ? Reset : Additive;
 }
 
-bool TreeScopeStyleSheetCollection::activeLoadingStyleSheetLoaded(const Vector<RefPtr<CSSStyleSheet> >& newStyleSheets)
+bool TreeScopeStyleSheetCollection::activeLoadingStyleSheetLoaded(const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& newStyleSheets)
 {
     // StyleSheets of <style> elements that @import stylesheets are active but loading. We need to trigger a full recalc when such loads are done.
     bool hasActiveLoadingStylesheet = false;
@@ -204,7 +204,7 @@ void TreeScopeStyleSheetCollection::resetAllRuleSetsInTreeScope(StyleResolver* s
     styleResolver->resetAuthorStyle(toContainerNode(&m_treeScope.rootNode()));
 }
 
-static bool styleSheetsUseRemUnits(const Vector<RefPtr<CSSStyleSheet> >& sheets)
+static bool styleSheetsUseRemUnits(const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& sheets)
 {
     for (unsigned i = 0; i < sheets.size(); ++i) {
         if (sheets[i]->contents()->usesRemUnits())