Fix problems with flakes in SVG LayoutTests by reordering arithmetic.

Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp

Index: Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp
diff --git a/Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp b/Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp
index dceefe5d35b9c7392718ccf28cc0581d732afc70..57c963fd83c7a70eac48c7da7617df66dd4a8c7d 100644
--- a/Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp
+++ b/Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp
@@ -40,7 +40,7 @@ float SVGTextLayoutEngineBaseline::calculateBaselineShift(const SVGRenderStyle&
     if (style.baselineShift() == BS_LENGTH) {
         RefPtrWillBeRawPtr<SVGLength> baselineShiftValueLength = style.baselineShiftValue();
         if (baselineShiftValueLength->unitType() == LengthTypePercentage)
-            return baselineShiftValueLength->valueAsPercentage() * m_font.fontDescription().computedPixelSize();
+            return baselineShiftValueLength->scaleByPercentage(m_font.fontDescription().computedPixelSize());
 
         SVGLengthContext lengthContext(contextElement);
         return baselineShiftValueLength->value(lengthContext);