Update CSS classes to use OVERRIDE / FINAL when needed

Source/core/css/VariablesIterator.h

Index: Source/core/css/VariablesIterator.h
diff --git a/Source/core/css/VariablesIterator.h b/Source/core/css/VariablesIterator.h
index 5a411fe9a21cc8da648d1b00b0e8c524d27654c1..b8762d2f8f84c1ef3850265eca9f98eb9f1823a9 100644
--- a/Source/core/css/VariablesIterator.h
+++ b/Source/core/css/VariablesIterator.h
@@ -36,16 +36,16 @@ public:
 protected:
     void takeRemainingNames(Vector<AtomicString>& remainingNames) { m_remainingNames.swap(remainingNames); }
 
-    virtual void initRemainingNames(const StylePropertySet*);
+    void initRemainingNames(const StylePropertySet*);
 
 private:
-    virtual void advance() OVERRIDE;
-    virtual bool atEnd() const OVERRIDE { return m_remainingNames.isEmpty(); }
-    virtual AtomicString name() const OVERRIDE { return m_remainingNames.last(); }
-    virtual String value() const OVERRIDE;
-    virtual void addedVariable(const AtomicString& name) OVERRIDE;
-    virtual void removedVariable(const AtomicString& name) OVERRIDE;
-    virtual void clearedVariables() OVERRIDE;
+    virtual void advance() OVERRIDE FINAL;
+    virtual bool atEnd() const OVERRIDE FINAL { return m_remainingNames.isEmpty(); }
+    virtual AtomicString name() const OVERRIDE FINAL { return m_remainingNames.last(); }
+    virtual String value() const OVERRIDE FINAL;
+    virtual void addedVariable(const AtomicString& name) OVERRIDE FINAL;
+    virtual void removedVariable(const AtomicString& name) OVERRIDE FINAL;
+    virtual void clearedVariables() OVERRIDE FINAL;
 
     virtual MutableStylePropertySet* propertySet() const = 0;
 
@@ -53,7 +53,7 @@ private:
     Vector<AtomicString> m_newNames;
 };
 
-class VariablesIterator : public AbstractVariablesIterator {
+class VariablesIterator FINAL : public AbstractVariablesIterator {
 public:
     static PassRefPtr<VariablesIterator> create(MutableStylePropertySet*);