should've been a forward declaration of nsIPresContext. This will remove 117 warnings.

layout/xul/base/src/nsIBox.h

@@ -28,7 +28,7 @@
 #ifndef nsIBox_h___
 #define nsIBox_h___
 
-class aPresContext;
+class nsIPresContext;
 class nsIFrame;
 struct nsHTMLReflowState;
 class nsBoxInfo;