Oilpan: Prepare to move FormController and DocumentState to Oilpan heap, and remove RefPtrs to HTML…

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index d0c492a5219386e4bd87f6691f85028aa2ccd564..d99f5d004a716aa50c8b724f4f12912ea056d40a 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -639,12 +639,10 @@ void Document::dispose()
     destroyTreeScopeData();
 
     removeDetachedChildren();
-#endif
 
     // removeDetachedChildren() can access FormController.
     m_formController.clear();
 
-#if !ENABLE(OILPAN)
     m_markers->clear();
 
     m_cssCanvasElements.clear();
@@ -5706,6 +5704,7 @@ void Document::trace(Visitor* visitor)
     visitor->trace(m_topLayerElements);
     visitor->trace(m_elemSheet);
     visitor->trace(m_styleEngine);
+    visitor->trace(m_formController);
     visitor->trace(m_fetcher);
     visitor->trace(m_contextFeatures);
     visitor->trace(m_styleSheetList);