[oilpan] The Node hierarchy should have correct accept method chains

Source/core/html/shadow/DateTimeNumericFieldElement.h

Index: Source/core/html/shadow/DateTimeNumericFieldElement.h
diff --git a/Source/core/html/shadow/DateTimeNumericFieldElement.h b/Source/core/html/shadow/DateTimeNumericFieldElement.h
index 508a0f06435265a6a0eda7ee78e7eec83baf2050..124f01fd200483efaa77eb2f044a08986aab4a8a 100644
--- a/Source/core/html/shadow/DateTimeNumericFieldElement.h
+++ b/Source/core/html/shadow/DateTimeNumericFieldElement.h
@@ -58,8 +58,6 @@ public:
         int maximum;
     };
 
-    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
-
 protected:
     DateTimeNumericFieldElement(Handle<Document>, FieldOwner&, const Range&, const Range& hardLimits, const String& placeholder, const Step& = Step());
 
@@ -77,6 +75,8 @@ protected:
     virtual int valueAsInteger() const OVERRIDE FINAL;
     virtual String visibleValue() const OVERRIDE FINAL;
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     // DateTimeFieldElement functions.
     virtual void didBlur() OVERRIDE FINAL;