Change RenderObject::style(bool) to accept an enum instead

Source/core/rendering/RenderBR.h

Index: Source/core/rendering/RenderBR.h
diff --git a/Source/core/rendering/RenderBR.h b/Source/core/rendering/RenderBR.h
index ff69d3a87a2e75120e2bf8fa325666f1b6965a89..f235b88e23a3d3a5de9daba26018c6e70e8f5d68 100644
--- a/Source/core/rendering/RenderBR.h
+++ b/Source/core/rendering/RenderBR.h
@@ -39,9 +39,9 @@ public:
     virtual LayoutRect selectionRectForPaintInvalidation(const RenderLayerModelObject* /*paintInvalidationContainer*/, bool /*clipToVisibleContent*/) OVERRIDE { return LayoutRect(); }
 
     virtual float width(unsigned /*from*/, unsigned /*len*/, const Font&, float /*xPos*/, TextDirection, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/ , GlyphOverflow* = 0) const OVERRIDE { return 0; }
-    virtual float width(unsigned /*from*/, unsigned /*len*/, float /*xpos*/, TextDirection, bool = false /*firstLine*/, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/, GlyphOverflow* = 0) const OVERRIDE { return 0; }
+    virtual float width(unsigned /*from*/, unsigned /*len*/, float /*xpos*/, TextDirection, OwnOrFirstLineStyle = OwnStyle, HashSet<const SimpleFontData*>* = 0 /*fallbackFonts*/, GlyphOverflow* = 0) const OVERRIDE { return 0; }
 
-    int lineHeight(bool firstLine) const;
+    int lineHeight(OwnOrFirstLineStyle) const;
 
     // overrides
     virtual bool isBR() const OVERRIDE { return true; }