Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorStyleSheet.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 927 matching lines @@
         if (!sourceRange.length() && ruleSourceData->ruleBodyRange.start <= sourceRange.start && sourceRange.start <= ruleSourceData->ruleBodyRange.end) {
             *ruleId = InspectorCSSId(id(), i);
             *propertyIndex = propertyData.size();
             *overwrite = false;
             return true;
         }
     }
     return false;
 }
 
-PassRefPtr<InspectorStyleSheet> InspectorStyleSheet::create(InspectorPageAgent* pageAgent, InspectorResourceAgent* resourceAgent, const String& id, PassRefPtrWillBeRawPtr<CSSStyleSheet> pageStyleSheet, TypeBuilder::CSS::StyleSheetOrigin::Enum origin, const String& documentURL, Listener* listener)
+PassRefPtrWillBeRawPtr<InspectorStyleSheet> InspectorStyleSheet::create(InspectorPageAgent* pageAgent, InspectorResourceAgent* resourceAgent, const String& id, PassRefPtrWillBeRawPtr<CSSStyleSheet> pageStyleSheet, TypeBuilder::CSS::StyleSheetOrigin::Enum origin, const String& documentURL, Listener* listener)
 {
-    return adoptRef(new InspectorStyleSheet(pageAgent, resourceAgent, id, pageStyleSheet, origin, documentURL, listener));
+    return adoptRefWillBeNoop(new InspectorStyleSheet(pageAgent, resourceAgent, id, pageStyleSheet, origin, documentURL, listener));
 }
 
 InspectorStyleSheet::InspectorStyleSheet(InspectorPageAgent* pageAgent, InspectorResourceAgent* resourceAgent, const String& id, PassRefPtrWillBeRawPtr<CSSStyleSheet> pageStyleSheet, TypeBuilder::CSS::StyleSheetOrigin::Enum origin, const String& documentURL, Listener* listener)
     : InspectorStyleSheetBase(id, listener)
     , m_pageAgent(pageAgent)
     , m_resourceAgent(resourceAgent)
     , m_pageStyleSheet(pageStyleSheet)
     , m_origin(origin)
     , m_documentURL(documentURL)
 {
     m_parsedStyleSheet = adoptPtr(new ParsedStyleSheet(m_pageStyleSheet.get()));
 }
 
 InspectorStyleSheet::~InspectorStyleSheet()
 {
 }
 
+void InspectorStyleSheet::trace(Visitor* visitor)
+{
+    visitor->trace(m_pageAgent);
+    visitor->trace(m_resourceAgent);
+    visitor->trace(m_pageStyleSheet);
+    visitor->trace(m_flatRules);
+    InspectorStyleSheetBase::trace(visitor);
+}
+
 static String styleSheetURL(CSSStyleSheet* pageStyleSheet)
 {
     if (pageStyleSheet && !pageStyleSheet->contents()->baseURL().isEmpty())
         return pageStyleSheet->contents()->baseURL().string();
     return emptyString();
 }
 
 String InspectorStyleSheet::finalURL() const
 {
     String url = styleSheetURL(m_pageStyleSheet.get());
@@ skipping 556 matching lines @@
     if (!ownerNode || ownerNode->nodeType() != Node::ELEMENT_NODE)
         return false;
     Element& ownerElement = toElement(*ownerNode);
 
     if (!isHTMLStyleElement(ownerElement) && !isSVGStyleElement(ownerElement))
         return false;
     *result = ownerElement.textContent();
     return true;
 }
 
-PassRefPtr<InspectorStyleSheetForInlineStyle> InspectorStyleSheetForInlineStyle::create(const String& id, PassRefPtr<Element> element, Listener* listener)
+PassRefPtrWillBeRawPtr<InspectorStyleSheetForInlineStyle> InspectorStyleSheetForInlineStyle::create(const String& id, PassRefPtr<Element> element, Listener* listener)
 {
-    return adoptRef(new InspectorStyleSheetForInlineStyle(id, element, listener));
+    return adoptRefWillBeNoop(new InspectorStyleSheetForInlineStyle(id, element, listener));
 }
 
 InspectorStyleSheetForInlineStyle::InspectorStyleSheetForInlineStyle(const String& id, PassRefPtr<Element> element, Listener* listener)
     : InspectorStyleSheetBase(id, listener)
     , m_element(element)
     , m_ruleSourceData(nullptr)
     , m_isStyleTextValid(false)
 {
     ASSERT(m_element);
     m_inspectorStyle = InspectorStyle::create(InspectorCSSId(id, 0), inlineStyle(), this);
@@ skipping 106 matching lines @@
         return result.release();
     }
 
     RefPtrWillBeRawPtr<MutableStylePropertySet> tempDeclaration = MutableStylePropertySet::create();
     RuleSourceDataList ruleSourceDataResult;
     StyleSheetHandler handler(m_styleText, &m_element->document(), m_element->document().elementSheet().contents(), &ruleSourceDataResult);
     BisonCSSParser(parserContextForDocument(&m_element->document())).parseDeclaration(tempDeclaration.get(), m_styleText, &handler, m_element->document().elementSheet().contents());
     return ruleSourceDataResult.first().release();
 }
 
+void InspectorStyleSheetForInlineStyle::trace(Visitor* visitor)
+{
+    visitor->trace(m_ruleSourceData);
+    InspectorStyleSheetBase::trace(visitor);
+}
+
 } // namespace WebCore