ASSERT that typeface is set in SimpleFontData::platformInit

Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp

Index: Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
diff --git a/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp b/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
index 0a9b306cb8c3514f41e2b0b143cdcf1cd0418354..e2a3feecd64d706cd601e568734db6ff63829f63 100644
--- a/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
+++ b/Source/core/platform/graphics/skia/SimpleFontDataSkia.cpp
@@ -65,6 +65,7 @@ void SimpleFontData::platformInit()
     m_platformData.setupPaint(&paint);
     paint.getFontMetrics(&metrics);
     SkTypeface* face = paint.getTypeface();
+    ASSERT(face);
 
     static const uint32_t vdmxTag = SkSetFourByteTag('V', 'D', 'M', 'X');
     int pixelSize = m_platformData.size() + 0.5;