Oilpan: Prepare moving InspectorController and InspectorAgents to oilpan.

Source/core/inspector/InspectorDebuggerAgent.cpp

Index: Source/core/inspector/InspectorDebuggerAgent.cpp
diff --git a/Source/core/inspector/InspectorDebuggerAgent.cpp b/Source/core/inspector/InspectorDebuggerAgent.cpp
index 1fa75ee4727694f4fbea9d6407a380e4f047ec6a..1337664afa87a91ec39434c8e07e42b059d1851e 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.cpp
+++ b/Source/core/inspector/InspectorDebuggerAgent.cpp
@@ -120,7 +120,7 @@ InspectorDebuggerAgent::InspectorDebuggerAgent(InjectedScriptManager* injectedSc
     , m_debuggerStepScheduled(false)
     , m_steppingFromFramework(false)
     , m_pausingOnNativeEvent(false)
-    , m_listener(0)
+    , m_listener(nullptr)
     , m_skippedStepInCount(0)
     , m_skipAllPauses(false)
 {
@@ -128,7 +128,9 @@ InspectorDebuggerAgent::InspectorDebuggerAgent(InjectedScriptManager* injectedSc
 
 InspectorDebuggerAgent::~InspectorDebuggerAgent()
 {
+#if !ENABLE(OILPAN)
     ASSERT(!m_instrumentingAgents->inspectorDebuggerAgent());
+#endif
 }
 
 void InspectorDebuggerAgent::init()
@@ -1432,5 +1434,11 @@ void InspectorDebuggerAgent::reset()
         m_frontend->globalObjectCleared();
 }
 
+void InspectorDebuggerAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_listener);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace blink