Oilpan: fix build after r195600.

Source/core/editing/VisibleSelection.h

Index: Source/core/editing/VisibleSelection.h
diff --git a/Source/core/editing/VisibleSelection.h b/Source/core/editing/VisibleSelection.h
index 4e445c93169327b6e73e0af30123cc0fa39b0363..ba6938d8f1e23483d44b3b9860007737aba27e52 100644
--- a/Source/core/editing/VisibleSelection.h
+++ b/Source/core/editing/VisibleSelection.h
@@ -41,6 +41,7 @@ enum SelectionDirection { DirectionForward, DirectionBackward, DirectionRight, D
 
 class CORE_EXPORT VisibleSelection {
     DISALLOW_ALLOCATION();
+    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(VisibleSelection);
 public:
     VisibleSelection();
 
@@ -55,8 +56,6 @@ public:
     VisibleSelection(const VisibleSelection&);
     VisibleSelection& operator=(const VisibleSelection&);
 
-    ~VisibleSelection();
-
     static VisibleSelection selectionFromContentsOfNode(Node*);
 
     SelectionType selectionType() const { return m_selectionType; }