Oilpan: promptly dispose style resolvers upon clearing.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 101 matching lines @@
     , m_position(position)
     , m_specificity(selector().specificity())
     , m_containsUncommonAttributeSelector(blink::containsUncommonAttributeSelector(selector()))
     , m_linkMatchType(selector().computeLinkMatchType())
     , m_hasDocumentSecurityOrigin(addRuleFlags & RuleHasDocumentSecurityOrigin)
     , m_propertyWhitelistType(determinePropertyWhitelistType(addRuleFlags, selector()))
 {
     SelectorFilter::collectIdentifierHashes(selector(), m_descendantSelectorIdentifierHashes, maximumIdentifierCount);
 }
 
+RuleSet::~RuleSet()
+{
+}
+
+#if ENABLE(OILPAN)
+void RuleSet::dispose()
+{
+    m_idRules.clear();
+    m_classRules.clear();
+    m_tagRules.clear();
+    m_shadowPseudoElementRules.clear();
+    m_linkPseudoClassRules.clear();
+    m_cuePseudoRules.clear();
+    m_focusPseudoClassRules.clear();
+    m_universalRules.clear();
+    m_shadowHostRules.clear();
+    m_features.clear();
+    m_pageRules.clear();
+    m_viewportRules.clear();
+    m_fontFaceRules.clear();
+    m_keyframesRules.clear();
+    m_treeBoundaryCrossingRules.clear();
+    m_shadowDistributedRules.clear();
+    m_pendingRules.clear();
+}
+#endif
+
 void RuleSet::addToRuleSet(const AtomicString& key, PendingRuleMap& map, const RuleData& ruleData)
 {
     OwnPtrWillBeMember<WillBeHeapLinkedStack<RuleData>>& rules = map.add(key, nullptr).storedValue->value;
     if (!rules)
         rules = adoptPtrWillBeNoop(new WillBeHeapLinkedStack<RuleData>);
     rules->push(ruleData);
 }
 
 static void extractValuesforSelector(const CSSSelector* selector, AtomicString& id, AtomicString& className, AtomicString& customPseudoElementName, AtomicString& tagName)
 {
@@ skipping 262 matching lines @@
 
 #ifndef NDEBUG
 void RuleSet::show()
 {
     for (const auto& rule: m_allRules)
         rule.selector().show();
 }
 #endif
 
 } // namespace blink