Oilpan: Prepare moving InspectorController and InspectorAgents to oilpan.

Source/core/inspector/InspectorCSSAgent.cpp

Index: Source/core/inspector/InspectorCSSAgent.cpp
diff --git a/Source/core/inspector/InspectorCSSAgent.cpp b/Source/core/inspector/InspectorCSSAgent.cpp
index 554696ef8e49339237bc6141c013128189211f4c..b32fc778bb563623b14e1afa39b01f6b190c35db 100644
--- a/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/Source/core/inspector/InspectorCSSAgent.cpp
@@ -395,7 +395,7 @@ void InspectorCSSAgent::clearFrontend()
 void InspectorCSSAgent::discardAgent()
 {
     m_domAgent->setDOMListener(0);
-    m_domAgent = 0;
+    m_domAgent = nullptr;
 }
 
 void InspectorCSSAgent::restore()
@@ -577,7 +577,7 @@ void InspectorCSSAgent::setActiveStyleSheets(Document* document, const Vector<CS
 
     for (HashSet<CSSStyleSheet*>::iterator it = removedSheets.begin(); it != removedSheets.end(); ++it) {
         CSSStyleSheet* cssStyleSheet = *it;
-        RefPtr<InspectorStyleSheet> inspectorStyleSheet = m_cssStyleSheetToInspectorStyleSheet.get(cssStyleSheet);
+        RefPtrWillBeRawPtr<InspectorStyleSheet> inspectorStyleSheet = m_cssStyleSheetToInspectorStyleSheet.get(cssStyleSheet);
         ASSERT(inspectorStyleSheet);
 
         documentCSSStyleSheets->remove(cssStyleSheet);
@@ -1452,5 +1452,15 @@ void InspectorCSSAgent::resetPseudoStates()
         (*it)->setNeedsStyleRecalc(SubtreeStyleChange);
 }
 
+void InspectorCSSAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_domAgent);
+    visitor->trace(m_pageAgent);
+    visitor->trace(m_resourceAgent);
+    visitor->trace(m_documentToViaInspectorStyleSheet);
+    visitor->trace(m_inspectorUserAgentStyleSheet);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace WebCore