Use LayoutRect during addFocusRingRects to avoid loss of precision

Source/core/rendering/RenderBox.h

Index: Source/core/rendering/RenderBox.h
diff --git a/Source/core/rendering/RenderBox.h b/Source/core/rendering/RenderBox.h
index 21c870a64f501c9efb5ff8693e4519b93fc55045..f2a71ba47a840f7334122a79b96c0a48e7f2fdda 100644
--- a/Source/core/rendering/RenderBox.h
+++ b/Source/core/rendering/RenderBox.h
@@ -196,7 +196,7 @@ public:
     // does include the intrinsic padding in the content box as this is what some callers expect (like getComputedStyle).
     LayoutRect computedCSSContentBoxRect() const { return LayoutRect(borderLeft() + computedCSSPaddingLeft(), borderTop() + computedCSSPaddingTop(), clientWidth() - computedCSSPaddingLeft() - computedCSSPaddingRight(), clientHeight() - computedCSSPaddingTop() - computedCSSPaddingBottom()); }
 
-    virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) const OVERRIDE;
+    virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const OVERRIDE;
 
     // Use this with caution! No type checking is done!
     RenderBox* previousSiblingBox() const;