Remove unsafe getFontMetrics methods

third_party/WebKit/Source/core/layout/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 16 matching lines @@
 
 SVGTextLayoutEngineBaseline::SVGTextLayoutEngineBaseline(const Font& font,
                                                          float effectiveZoom)
     : m_font(font), m_effectiveZoom(effectiveZoom) {
   ASSERT(m_effectiveZoom);
 }
 
 float SVGTextLayoutEngineBaseline::calculateBaselineShift(
     const ComputedStyle& style) const {
   const SVGComputedStyle& svgStyle = style.svgStyle();
+  const SimpleFontData* fontData = m_font.primaryFont();
+  DCHECK(fontData);
+  if (!fontData)
+    return 0;
 
+  DCHECK(m_effectiveZoom);
   switch (svgStyle.baselineShift()) {
     case BS_LENGTH:
       return SVGLengthContext::valueForLength(
           svgStyle.baselineShiftValue(), style,
           m_font.getFontDescription().computedPixelSize() / m_effectiveZoom);
     case BS_SUB:
-      return -m_font.getFontMetrics().floatHeight() / 2 / m_effectiveZoom;
+      return -fontData->getFontMetrics().floatHeight() / 2 / m_effectiveZoom;
     case BS_SUPER:
-      return m_font.getFontMetrics().floatHeight() / 2 / m_effectiveZoom;
+      return fontData->getFontMetrics().floatHeight() / 2 / m_effectiveZoom;
     default:
       ASSERT_NOT_REACHED();
       return 0;
   }
 }
 
 EAlignmentBaseline
 SVGTextLayoutEngineBaseline::dominantBaselineToAlignmentBaseline(
     bool isVerticalText,
     LineLayoutItem textLineLayout) const {
@@ skipping 57 matching lines @@
   ASSERT(textLineLayoutParent);
 
   EAlignmentBaseline baseline =
       textLineLayout.style()->svgStyle().alignmentBaseline();
   if (baseline == AB_AUTO || baseline == AB_BASELINE) {
     baseline = dominantBaselineToAlignmentBaseline(isVerticalText,
                                                    textLineLayoutParent);
     ASSERT(baseline != AB_AUTO && baseline != AB_BASELINE);
   }
 
-  const FontMetrics& fontMetrics = m_font.getFontMetrics();
+  const SimpleFontData* fontData = m_font.primaryFont();
+  DCHECK(fontData);
+  if (!fontData)
+    return 0;
+
+  const FontMetrics& fontMetrics = fontData->getFontMetrics();
   float ascent = fontMetrics.floatAscent() / m_effectiveZoom;
   float descent = fontMetrics.floatDescent() / m_effectiveZoom;
   float xheight = fontMetrics.xHeight() / m_effectiveZoom;
 
   // Note: http://wiki.apache.org/xmlgraphics-fop/LineLayout/AlignmentHandling
   switch (baseline) {
     case AB_BEFORE_EDGE:
     case AB_TEXT_BEFORE_EDGE:
       return ascent;
     case AB_MIDDLE:
@@ skipping 11 matching lines @@
     case AB_MATHEMATICAL:
       return ascent / 2;
     case AB_BASELINE:
     default:
       ASSERT_NOT_REACHED();
       return 0;
   }
 }
 
 }  // namespace blink