Oilpan: move InspectorOverlay to the heap.

Source/core/inspector/InspectorOverlay.cpp

Index: Source/core/inspector/InspectorOverlay.cpp
diff --git a/Source/core/inspector/InspectorOverlay.cpp b/Source/core/inspector/InspectorOverlay.cpp
index 17ef71e0cc59b55f2ac30434b64d6c575e57f436..0b44c945b016b51302860e93de04dc0af6044f60 100644
--- a/Source/core/inspector/InspectorOverlay.cpp
+++ b/Source/core/inspector/InspectorOverlay.cpp
@@ -354,6 +354,15 @@ InspectorOverlay::~InspectorOverlay()
     ASSERT(!m_overlayPage);

[haraken, 2014/12/10 23:44:22]

I think this should be in #if !ENABLE(OILPAN).

[sof, 2014/12/11 08:11:10]

It checks that freePage() has been called, ensuring a tidy detach & dispose.
Oilpan or not.

 }
 
+void InspectorOverlay::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    visitor->trace(m_highlightNode);
+    visitor->trace(m_eventTargetNode);
+    visitor->trace(m_overlayPage);
+    visitor->trace(m_overlayHost);
+}
+
 void InspectorOverlay::paint(GraphicsContext& context)
 {
     if (isEmpty())