Fixing superscript and subscript baseline for tiny fonts in SVG

third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp

Index: third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp b/third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp
index 1bad4deee0563157ca9e4566a892eb66e25e87a5..bad40b533bb50eeb53c02751fa6bff3b577e7b5b 100644
--- a/third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp
+++ b/third_party/WebKit/Source/platform/fonts/SimpleFontData.cpp
@@ -356,6 +356,12 @@ PassRefPtr<SimpleFontData> SimpleFontData::emphasisMarkFontData(
   return m_derivedFontData->emphasisMark;
 }
 
+PassRefPtr<SimpleFontData> SimpleFontData::subpixelAscentDescentFontData()
+    const {
+  return SimpleFontData::create(m_platformData, m_customFontData,
+                                m_isTextOrientationFallback, true);
+}
+
 bool SimpleFontData::isTextOrientationFallbackOf(
     const SimpleFontData* fontData) const {
   if (!isTextOrientationFallback() || !fontData->m_derivedFontData)