Smaller vtbls in RenderObject

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 4a2c88151b9f5525fb09d7ae939c5bcf51afa44e..44a999d8799dba9a22ff10ecc1e39265447050f1 100644
--- a/Source/core/rendering/RenderMeter.h
+++ b/Source/core/rendering/RenderMeter.h
@@ -40,7 +40,7 @@ private:
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
 
     virtual const char* renderName() const override { return "RenderMeter"; }
-    virtual bool isMeter() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectMeter || RenderBlockFlow::isOfType(type); }
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMeter, isMeter());