Oilpan: move editing objects to the heap.

Source/core/editing/Caret.h

Index: Source/core/editing/Caret.h
diff --git a/Source/core/editing/Caret.h b/Source/core/editing/Caret.h
index 3d9f9eba45c01a49fdb3a904a670547878173b25..3c3d337c766fef7b02bd289e22560d5a40ddae17 100644
--- a/Source/core/editing/Caret.h
+++ b/Source/core/editing/Caret.h
@@ -40,7 +40,7 @@ class RenderView;
 
 class CaretBase {
     WTF_MAKE_NONCOPYABLE(CaretBase);
-    WTF_MAKE_FAST_ALLOCATED;
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 protected:
     enum CaretVisibility { Visible, Hidden };
     explicit CaretBase(CaretVisibility = Hidden);
@@ -71,11 +71,11 @@ private:
     CaretVisibility m_caretVisibility;
 };
 
-class DragCaretController : private CaretBase {
+class DragCaretController FINAL : public NoBaseWillBeGarbageCollected<DragCaretController>, private CaretBase {
     WTF_MAKE_NONCOPYABLE(DragCaretController);
-    WTF_MAKE_FAST_ALLOCATED;
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
-    static PassOwnPtr<DragCaretController> create();
+    static PassOwnPtrWillBeRawPtr<DragCaretController> create();
 
     RenderObject* caretRenderer() const;
     void paintDragCaret(LocalFrame*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
@@ -90,6 +90,8 @@ public:
 
     void nodeWillBeRemoved(Node&);
 
+    void trace(Visitor*);
+
 private:
     DragCaretController();