Update rendering classes to use OVERRIDE / FINAL when needed

Source/core/rendering/RenderTextFragment.h

Index: Source/core/rendering/RenderTextFragment.h
diff --git a/Source/core/rendering/RenderTextFragment.h b/Source/core/rendering/RenderTextFragment.h
index 44bbfe81f6d110e40bcfd396027e0b4e3d54c850..9d81d43cf1813d85dc8284cac81e0076dcb7fa38 100644
--- a/Source/core/rendering/RenderTextFragment.h
+++ b/Source/core/rendering/RenderTextFragment.h
@@ -37,7 +37,7 @@ public:
     RenderTextFragment(Node*, StringImpl*);
     virtual ~RenderTextFragment();
 
-    virtual bool isTextFragment() const { return true; }
+    virtual bool isTextFragment() const OVERRIDE { return true; }
 
     virtual bool canBeSelectionLeaf() const OVERRIDE { return node() && node()->rendererIsEditable(); }
 
@@ -50,19 +50,19 @@ public:
     RenderText* firstRenderTextInFirstLetter() const;
 
     StringImpl* contentString() const { return m_contentString.get(); }
-    virtual PassRefPtr<StringImpl> originalText() const;
+    virtual PassRefPtr<StringImpl> originalText() const OVERRIDE;
 
     virtual void setText(PassRefPtr<StringImpl>, bool force = false) OVERRIDE;
 
     virtual void transformText() OVERRIDE;
 
 protected:
-    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
+    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
 
 private:
-    virtual void willBeDestroyed();
+    virtual void willBeDestroyed() OVERRIDE;
 
-    virtual UChar previousCharacter() const;
+    virtual UChar previousCharacter() const OVERRIDE;
     RenderBlock* blockForAccompanyingFirstLetter() const;
     virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) OVERRIDE;