Remove unsafe getFontMetrics methods

third_party/WebKit/Source/core/layout/svg/SVGTextLayoutEngine.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010-2012. 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 107 matching lines @@
   LineLayoutSVGInlineText textLineLayout =
       LineLayoutSVGInlineText(textBox->getLineLayoutItem());
   TextRun run = textBox->constructTextRun(textLineLayout.styleRef(),
                                           m_currentTextFragment);
 
   float scalingFactor = textLineLayout.scalingFactor();
   ASSERT(scalingFactor);
   const Font& scaledFont = textLineLayout.scaledFont();
   FloatRect glyphOverflowBounds;
 
+  const SimpleFontData* fontData = scaledFont.primaryFont();
+  DCHECK(fontData);
+  if (!fontData)
+    return;
+
   float width = scaledFont.width(run, nullptr, &glyphOverflowBounds);
-  float ascent = scaledFont.getFontMetrics().floatAscent();
-  float descent = scaledFont.getFontMetrics().floatDescent();
+  float ascent = fontData->getFontMetrics().floatAscent();
+  float descent = fontData->getFontMetrics().floatDescent();
   m_currentTextFragment.glyphOverflow.setFromBounds(glyphOverflowBounds, ascent,
                                                     descent, width);
   m_currentTextFragment.glyphOverflow.top /= scalingFactor;
   m_currentTextFragment.glyphOverflow.left /= scalingFactor;
   m_currentTextFragment.glyphOverflow.right /= scalingFactor;
   m_currentTextFragment.glyphOverflow.bottom /= scalingFactor;
 
-  float height = scaledFont.getFontMetrics().floatHeight();
+  float height = fontData->getFontMetrics().floatHeight();
   m_currentTextFragment.height = height / scalingFactor;
   m_currentTextFragment.width = width / scalingFactor;
 }
 
 void SVGTextLayoutEngine::recordTextFragment(SVGInlineTextBox* textBox) {
   ASSERT(!m_currentTextFragment.length);
 
   // Figure out length of fragment.
   m_currentTextFragment.length = m_visualMetricsIterator.characterOffset() -
                                  m_currentTextFragment.characterOffset;
@@ skipping 382 matching lines @@
   }
 
   if (!didStartTextFragment)
     return;
 
   // Close last open fragment, if needed.
   recordTextFragment(textBox);
 }
 
 }  // namespace blink