Oilpan: Prepare moving InspectorController and InspectorAgents to oilpan.

Source/core/inspector/InspectorConsoleAgent.cpp

Index: Source/core/inspector/InspectorConsoleAgent.cpp
diff --git a/Source/core/inspector/InspectorConsoleAgent.cpp b/Source/core/inspector/InspectorConsoleAgent.cpp
index c9ef8feff85619a87c34ef7713abe2e2b26c29a1..bf61e1043b07189382483f0474c4affac7d2faef 100644
--- a/Source/core/inspector/InspectorConsoleAgent.cpp
+++ b/Source/core/inspector/InspectorConsoleAgent.cpp
@@ -75,12 +75,20 @@ InspectorConsoleAgent::InspectorConsoleAgent(InspectorTimelineAgent* timelineAge
 
 InspectorConsoleAgent::~InspectorConsoleAgent()
 {
+#if !ENABLE(OILPAN)
     m_instrumentingAgents->setInspectorConsoleAgent(0);
-    m_instrumentingAgents = 0;
+    m_instrumentingAgents = nullptr;
+#endif
     m_state = 0;
     m_injectedScriptManager = 0;
 }
 
+void InspectorConsoleAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_timelineAgent);
+    InspectorBaseAgent::trace(visitor);
+}
+
 void InspectorConsoleAgent::init()
 {
     m_instrumentingAgents->setInspectorConsoleAgent(this);