Update rendering classes to use OVERRIDE / FINAL when needed

Source/core/rendering/RenderMeter.h

Index: Source/core/rendering/RenderMeter.h
diff --git a/Source/core/rendering/RenderMeter.h b/Source/core/rendering/RenderMeter.h
index d1f1e438aef4a44cf9c8088483610e4898cf44c7..a984799f71bbaf02c72b5327c959f0aada0512e4 100644
--- a/Source/core/rendering/RenderMeter.h
+++ b/Source/core/rendering/RenderMeter.h
@@ -34,7 +34,7 @@ public:
     virtual ~RenderMeter();
 
     HTMLMeterElement* meterElement() const;
-    virtual void updateFromElement();
+    virtual void updateFromElement() OVERRIDE;
 
 private:
     virtual void updateLogicalWidth() OVERRIDE;
@@ -42,8 +42,8 @@ private:
 
     virtual bool supportsPartialLayout() const OVERRIDE { return false; }
 
-    virtual const char* renderName() const { return "RenderMeter"; }
-    virtual bool isMeter() const { return true; }
+    virtual const char* renderName() const OVERRIDE { return "RenderMeter"; }
+    virtual bool isMeter() const OVERRIDE { return true; }
 
     double valueRatio() const;
 };