Update HTML forms classes to use OVERRIDE / FINAL when needed

Source/core/html/forms/DateInputType.h

Index: Source/core/html/forms/DateInputType.h
diff --git a/Source/core/html/forms/DateInputType.h b/Source/core/html/forms/DateInputType.h
index 2688adf1d93b64a9f3db54063d0804d77b52472a..0e5abecce660c6a0d71e4e4a39c0e2f8ab77dd3b 100644
--- a/Source/core/html/forms/DateInputType.h
+++ b/Source/core/html/forms/DateInputType.h
@@ -44,7 +44,7 @@ typedef BaseMultipleFieldsDateAndTimeInputType BaseDateInputType;
 typedef BaseChooserOnlyDateAndTimeInputType BaseDateInputType;
 #endif
 
-class DateInputType : public BaseDateInputType {
+class DateInputType FINAL : public BaseDateInputType {
 public:
     static PassRefPtr<InputType> create(HTMLInputElement&);
 
@@ -61,7 +61,7 @@ private:
     // BaseMultipleFieldsDateAndTimeInputType functions
     virtual String formatDateTimeFieldsState(const DateTimeFieldsState&) const OVERRIDE;
     virtual void setupLayoutParameters(DateTimeEditElement::LayoutParameters&, const DateComponents&) const OVERRIDE;
-    virtual bool isValidFormat(bool hasYear, bool hasMonth, bool hasWeek, bool hasDay, bool hasAMPM, bool hasHour, bool hasMinute, bool hasSecond) const;
+    virtual bool isValidFormat(bool hasYear, bool hasMonth, bool hasWeek, bool hasDay, bool hasAMPM, bool hasHour, bool hasMinute, bool hasSecond) const OVERRIDE;
 #endif
 };