Bug 1027354 - Fix fontweight and fontstyle on single char <mi>. r=roc

layout/generic/MathMLTextRunFactory.h

@@ -14,14 +14,22 @@
 class MathMLTextRunFactory : public nsTransformingTextRunFactory {
 public:
   MathMLTextRunFactory(nsTransformingTextRunFactory* aInnerTransformingTextRunFactory,
-                       uint8_t aSSTYScriptLevel)
+                       uint32_t aFlags, uint8_t aSSTYScriptLevel)
     : mInnerTransformingTextRunFactory(aInnerTransformingTextRunFactory),
+      mFlags(aFlags),
       mSSTYScriptLevel(aSSTYScriptLevel) {}
 
   virtual void RebuildTextRun(nsTransformedTextRun* aTextRun,
                               gfxContext* aRefContext) MOZ_OVERRIDE;
+  enum {
+    // Style effects which may override single character <mi> behaviour
+    MATH_FONT_STYLING_NORMAL   = 0x1, // fontstyle="normal" has been set.
+    MATH_FONT_WEIGHT_BOLD      = 0x2, // fontweight="bold" has been set.
+  };
+
 protected:
   nsAutoPtr<nsTransformingTextRunFactory> mInnerTransformingTextRunFactory;
+  uint32_t mFlags;
   uint8_t mSSTYScriptLevel;
 };