PurgeMemory.

third_party/WebKit/Source/core/css/StyleRule.cpp

Index: third_party/WebKit/Source/core/css/StyleRule.cpp
diff --git a/third_party/WebKit/Source/core/css/StyleRule.cpp b/third_party/WebKit/Source/core/css/StyleRule.cpp
index 7ff3eff764fff8a1e13dffdda1ebad8bc0446605..cad1d7a4e6c80cde32e78e00ac3ea492c762a8f5 100644
--- a/third_party/WebKit/Source/core/css/StyleRule.cpp
+++ b/third_party/WebKit/Source/core/css/StyleRule.cpp
@@ -52,6 +52,46 @@ PassRefPtrWillBeRawPtr<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSRule* paren
     return createCSSOMWrapper(0, parentRule);
 }
 
+void StyleRuleBase::purgeMemory()
+{
+    switch (type()) {
+    case Charset:
+        toStyleRuleCharset(this)->purgeMemory();
+        return;
+    case Style:
+        toStyleRule(this)->purgeMemory();
+        return;
+    case Page:
+        toStyleRulePage(this)->purgeMemory();
+        return;
+    case FontFace:
+        toStyleRuleFontFace(this)->purgeMemory();
+        return;
+    case Media:
+        toStyleRuleMedia(this)->purgeMemory();
+        return;
+    case Supports:
+        toStyleRuleSupports(this)->purgeMemory();
+        return;
+    case Import:
+        toStyleRuleImport(this)->purgeMemory();
+        return;
+    case Keyframes:
+        toStyleRuleKeyframes(this)->purgeMemory();
+        return;
+    case Keyframe:
+        toStyleRuleKeyframe(this)->purgeMemory();
+        return;
+    case Namespace:
+        toStyleRuleNamespace(this)->purgeMemory();
+        return;
+    case Viewport:
+        toStyleRuleViewport(this)->purgeMemory();
+        return;
+    }
+    ASSERT_NOT_REACHED();
+}
+
 DEFINE_TRACE(StyleRuleBase)
 {
     switch (type()) {
@@ -275,6 +315,12 @@ MutableStylePropertySet& StyleRule::mutableProperties()
     return *toMutableStylePropertySet(m_properties.get());
 }
 
+
+void StyleRule::purgeMemory()
+{
+    m_properties->purgeMemory();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRule)
 {
     visitor->trace(m_properties);
@@ -306,6 +352,11 @@ MutableStylePropertySet& StyleRulePage::mutableProperties()
     return *toMutableStylePropertySet(m_properties.get());
 }
 
+void StyleRulePage::purgeMemory()
+{
+    m_properties->purgeMemory();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRulePage)
 {
     visitor->trace(m_properties);
@@ -335,6 +386,11 @@ MutableStylePropertySet& StyleRuleFontFace::mutableProperties()
     return *toMutableStylePropertySet(m_properties);
 }
 
+void StyleRuleFontFace::purgeMemory()
+{
+    m_properties->purgeMemory();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleFontFace)
 {
     visitor->trace(m_properties);
@@ -365,6 +421,12 @@ void StyleRuleGroup::wrapperRemoveRule(unsigned index)
     m_childRules.remove(index);
 }
 
+void StyleRuleGroup::purgeMemory()
+{
+    for (StyleRuleBase* childRule : m_childRules)
+        childRule->purgeMemory();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleGroup)
 {
     visitor->trace(m_childRules);
@@ -427,6 +489,11 @@ MutableStylePropertySet& StyleRuleViewport::mutableProperties()
     return *toMutableStylePropertySet(m_properties);
 }
 
+void StyleRuleViewport::purgeMemory()
+{
+    m_properties->purgeMemory();
+}
+
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleViewport)
 {
     visitor->trace(m_properties);