Simplify SVGPathByteStream-based path-query functions

Source/core/svg/SVGPathUtilities.h

Index: Source/core/svg/SVGPathUtilities.h
diff --git a/Source/core/svg/SVGPathUtilities.h b/Source/core/svg/SVGPathUtilities.h
index 82a6eaa372b666c04aebc42d2a46d52f6f6a6cbc..8630bd75fdbe93ae32163ff90784a25d6f7412a5 100644
--- a/Source/core/svg/SVGPathUtilities.h
+++ b/Source/core/svg/SVGPathUtilities.h
@@ -47,9 +47,9 @@ bool buildStringFromSVGPathSegList(PassRefPtrWillBeRawPtr<SVGPathSegList>, Strin
 
 bool addToSVGPathByteStream(SVGPathByteStream&, const SVGPathByteStream&, unsigned repeatCount = 1);
 
-bool getSVGPathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream&, float length, unsigned& pathSeg);
-bool getTotalLengthOfSVGPathByteStream(const SVGPathByteStream&, float& totalLength);
-bool getPointAtLengthOfSVGPathByteStream(const SVGPathByteStream&, float length, FloatPoint&);
+unsigned getSVGPathSegAtLengthFromSVGPathByteStream(const SVGPathByteStream&, float length);
+float getTotalLengthOfSVGPathByteStream(const SVGPathByteStream&);
+FloatPoint getPointAtLengthOfSVGPathByteStream(const SVGPathByteStream&, float length);
 
 } // namespace blink