Move CSSRuleList to the garbage collected heap

Source/core/dom/StyleEngine.cpp

Index: Source/core/dom/StyleEngine.cpp
diff --git a/Source/core/dom/StyleEngine.cpp b/Source/core/dom/StyleEngine.cpp
index f59a38e203d880478af6b41ac56e4eeaad749b46..34268d314cc26c3b2aef57ac235036fa576be338 100644
--- a/Source/core/dom/StyleEngine.cpp
+++ b/Source/core/dom/StyleEngine.cpp
@@ -162,7 +162,7 @@ TreeScopeStyleSheetCollection* StyleEngine::styleSheetCollectionFor(TreeScope& t
     return it->value.get();
 }
 
-const Vector<RefPtr<StyleSheet> >& StyleEngine::styleSheetsForStyleSheetList(TreeScope& treeScope)
+const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& StyleEngine::styleSheetsForStyleSheetList(TreeScope& treeScope)
 {
     if (treeScope == m_document)
         return m_documentStyleSheetCollection.styleSheetsForStyleSheetList();
@@ -170,7 +170,7 @@ const Vector<RefPtr<StyleSheet> >& StyleEngine::styleSheetsForStyleSheetList(Tre
     return ensureStyleSheetCollectionFor(treeScope)->styleSheetsForStyleSheetList();
 }
 
-const Vector<RefPtr<CSSStyleSheet> >& StyleEngine::activeAuthorStyleSheets() const
+const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& StyleEngine::activeAuthorStyleSheets() const
 {
     return m_documentStyleSheetCollection.activeAuthorStyleSheets();
 }
@@ -190,7 +190,7 @@ void StyleEngine::resetCSSFeatureFlags(const RuleFeatureSet& features)
     m_maxDirectAdjacentSelectors = features.maxDirectAdjacentSelectors();
 }
 
-const Vector<RefPtr<CSSStyleSheet> >& StyleEngine::injectedAuthorStyleSheets() const
+const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet> >& StyleEngine::injectedAuthorStyleSheets() const
 {
     updateInjectedStyleSheetCache();
     return m_injectedAuthorStyleSheets;
@@ -214,7 +214,7 @@ void StyleEngine::updateInjectedStyleSheetCache() const
             continue;
         if (!URLPatternMatcher::matchesPatterns(m_document.url(), entry->whitelist()))
             continue;
-        RefPtr<CSSStyleSheet> groupSheet = CSSStyleSheet::createInline(const_cast<Document*>(&m_document), KURL());
+        RefPtrWillBeRawPtr<CSSStyleSheet> groupSheet = CSSStyleSheet::createInline(const_cast<Document*>(&m_document), KURL());
         m_injectedAuthorStyleSheets.append(groupSheet);
         groupSheet->contents()->parseString(entry->source());
     }
@@ -356,7 +356,7 @@ void StyleEngine::clearMediaQueryRuleSetStyleSheets()
 void StyleEngine::updateStyleSheetsInImport(DocumentStyleSheetCollector& parentCollector)
 {
     ASSERT(!isMaster());
-    Vector<RefPtr<StyleSheet> > sheetsForList;
+    WillBeHeapVector<RefPtrWillBeMember<StyleSheet> > sheetsForList;
     ImportedDocumentStyleSheetCollector subcollector(parentCollector, sheetsForList);
     m_documentStyleSheetCollection.collectStyleSheets(this, subcollector);
     m_documentStyleSheetCollection.swapSheetsForSheetList(sheetsForList);
@@ -401,12 +401,12 @@ bool StyleEngine::updateActiveStyleSheets(StyleResolverUpdateMode updateMode)
     return requiresFullStyleRecalc;
 }
 
-const Vector<RefPtr<StyleSheet> > StyleEngine::activeStyleSheetsForInspector() const
+const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> > StyleEngine::activeStyleSheetsForInspector() const
 {
     if (m_activeTreeScopes.isEmpty())
         return m_documentStyleSheetCollection.styleSheetsForStyleSheetList();
 
-    Vector<RefPtr<StyleSheet> > activeStyleSheets;
+    WillBeHeapVector<RefPtrWillBeMember<StyleSheet> > activeStyleSheets;
 
     activeStyleSheets.appendVector(m_documentStyleSheetCollection.styleSheetsForStyleSheetList());
 
@@ -618,4 +618,9 @@ void StyleEngine::removeSheet(StyleSheetContents* contents)
     sheetToTextCache().remove(contents);
 }
 
+void StyleEngine::trace(Visitor* visitor)
+{
+    m_authorStyleSheets.trace(visitor);
+}
+
 }