Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderTableSection.h

Index: Source/core/rendering/RenderTableSection.h
diff --git a/Source/core/rendering/RenderTableSection.h b/Source/core/rendering/RenderTableSection.h
index c7b0bc0f65d20b767a92efe092f224c54ab0d7ba..42b51ec6b3ee80d667186bb70662ffe31553fcc4 100644
--- a/Source/core/rendering/RenderTableSection.h
+++ b/Source/core/rendering/RenderTableSection.h
@@ -308,20 +308,7 @@ private:
     HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
 };
 
-inline RenderTableSection* toRenderTableSection(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableSection());
-    return static_cast<RenderTableSection*>(object);
-}
-
-inline const RenderTableSection* toRenderTableSection(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isTableSection());
-    return static_cast<const RenderTableSection*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderTableSection(const RenderTableSection*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection());
 
 } // namespace WebCore