Use glyph-ids for lookups of SVG font kerning-pairs

Source/core/rendering/svg/SVGTextMetricsBuilder.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 49 matching lines @@
     GlyphBuffer glyphBuffer;
     unsigned metricsLength = m_simpleWidthIterator->advance(m_textPosition + 1, &glyphBuffer);
     if (!metricsLength) {
         m_currentMetrics = SVGTextMetrics();
         return;
     }
 
     float currentWidth = m_simpleWidthIterator->runWidthSoFar() - m_totalWidth;
     m_totalWidth = m_simpleWidthIterator->runWidthSoFar();
 
-#if ENABLE(SVG_FONTS)
-    m_currentMetrics = SVGTextMetrics(m_text, m_textPosition, metricsLength, currentWidth, m_simpleWidthIterator->lastGlyphName());
-#else
-    m_currentMetrics = SVGTextMetrics(m_text, m_textPosition, metricsLength, currentWidth, emptyString());
-#endif
+    Glyph glyphId = glyphBuffer.glyphAt(0);
+    m_currentMetrics = SVGTextMetrics(m_text, m_textPosition, metricsLength, currentWidth, glyphId);
 }
 
 void SVGTextMetricsBuilder::advanceComplexText()
 {
     unsigned metricsLength = currentCharacterStartsSurrogatePair() ? 2 : 1;
     m_currentMetrics = SVGTextMetrics::measureCharacterRange(m_text, m_textPosition, metricsLength);
     m_complexStartToCurrentMetrics = SVGTextMetrics::measureCharacterRange(m_text, 0, m_textPosition + metricsLength);
     ASSERT(m_currentMetrics.length() == metricsLength);
 
     // Frequent case for Arabic text: when measuring a single character the arabic isolated form is taken
@@ skipping 135 matching lines @@
 }
 
 void SVGTextMetricsBuilder::buildMetricsAndLayoutAttributes(RenderSVGText* textRoot, RenderSVGInlineText* stopAtLeaf, SVGCharacterDataMap& allCharactersMap)
 {
     ASSERT(textRoot);
     MeasureTextData data(&allCharactersMap);
     walkTree(textRoot, stopAtLeaf, &data);
 }
 
 }