Fix problems with flakes in SVG LayoutTests by reordering arithmetic.

Source/core/rendering/svg/SVGTextLayoutEngineBaseline.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 22 matching lines @@
 SVGTextLayoutEngineBaseline::SVGTextLayoutEngineBaseline(const Font& font)
     : m_font(font)
 {
 }
 
 float SVGTextLayoutEngineBaseline::calculateBaselineShift(const SVGRenderStyle& style, SVGElement* contextElement) const
 {
     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);
     }
 
     switch (style.baselineShift()) {
     case BS_BASELINE:
         return 0;
     case BS_SUB:
         return -m_font.fontMetrics().floatHeight() / 2;
@@ skipping 168 matching lines @@
         xOrientationShift = metrics.width();
 
     // Horizontal advance calculation.
     if (angle && !orientationIsMultiplyOf180Degrees)
         return metrics.height();
 
     return metrics.width();
 }
 
 }