[Oilpan]: Make StylePropertySet fully garbage collected.

Source/core/css/StyleRule.cpp

Index: Source/core/css/StyleRule.cpp
diff --git a/Source/core/css/StyleRule.cpp b/Source/core/css/StyleRule.cpp
index 7735706796f59fa40ddd85bee35b38d6a8f6cc62..f95cb24ed14a11f6ecb871209d1b7a9d58c7f1f2 100644
--- a/Source/core/css/StyleRule.cpp
+++ b/Source/core/css/StyleRule.cpp
@@ -270,14 +270,20 @@ MutableStylePropertySet& StyleRule::mutableProperties()
 {
     if (!m_properties->isMutable())
         m_properties = m_properties->mutableCopy();
-    return *toMutableStylePropertySet(m_properties);
+    return *toMutableStylePropertySet(m_properties.get());
 }
 
-void StyleRule::setProperties(PassRefPtr<StylePropertySet> properties)
+void StyleRule::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
+void StyleRule::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_properties);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 StyleRulePage::StyleRulePage()
     : StyleRuleBase(Page)
 {
@@ -298,14 +304,20 @@ MutableStylePropertySet& StyleRulePage::mutableProperties()
 {
     if (!m_properties->isMutable())
         m_properties = m_properties->mutableCopy();
-    return *toMutableStylePropertySet(m_properties);
+    return *toMutableStylePropertySet(m_properties.get());
 }
 
-void StyleRulePage::setProperties(PassRefPtr<StylePropertySet> properties)
+void StyleRulePage::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
+void StyleRulePage::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_properties);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 StyleRuleFontFace::StyleRuleFontFace()
     : StyleRuleBase(FontFace)
 {
@@ -328,11 +340,17 @@ MutableStylePropertySet& StyleRuleFontFace::mutableProperties()
     return *toMutableStylePropertySet(m_properties);
 }
 
-void StyleRuleFontFace::setProperties(PassRefPtr<StylePropertySet> properties)
+void StyleRuleFontFace::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
+void StyleRuleFontFace::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_properties);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 StyleRuleGroup::StyleRuleGroup(Type type, WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase> >& adoptRule)
     : StyleRuleBase(type)
 {
@@ -418,11 +436,17 @@ MutableStylePropertySet& StyleRuleViewport::mutableProperties()
     return *toMutableStylePropertySet(m_properties);
 }
 
-void StyleRuleViewport::setProperties(PassRefPtr<StylePropertySet> properties)
+void StyleRuleViewport::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
+void StyleRuleViewport::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_properties);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 StyleRuleFilter::StyleRuleFilter(const String& filterName)
     : StyleRuleBase(Filter)
     , m_filterName(filterName)
@@ -447,9 +471,15 @@ MutableStylePropertySet& StyleRuleFilter::mutableProperties()
     return *toMutableStylePropertySet(m_properties);
 }
 
-void StyleRuleFilter::setProperties(PassRefPtr<StylePropertySet> properties)
+void StyleRuleFilter::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
 {
     m_properties = properties;
 }
 
+void StyleRuleFilter::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_properties);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 } // namespace WebCore