--- a/modules/libpr0n/src/RasterImage.h
+++ b/modules/libpr0n/src/RasterImage.h
@@ -271,33 +271,33 @@ public:
    * decode the image.
    *
    * XXX This method's only caller (WriteToContainer) ignores the return
    * value. Should this just return void?
    */
   nsresult AddSourceData(const char *aBuffer, PRUint32 aCount);
 
   /* Called after the all the source data has been added with addSourceData. */
-  virtual nsresult SourceDataComplete();
+  nsresult SourceDataComplete();
 
   /* Called for multipart images when there's a new source image to add. */
-  virtual nsresult NewSourceData();
+  nsresult NewSourceData();
 
   /**
    * A hint of the number of bytes of source data that the image contains. If
    * called early on, this can help reduce copying and reallocations by
    * appropriately preallocating the source data buffer.
    *
    * We take this approach rather than having the source data management code do
    * something more complicated (like chunklisting) because HTTP is by far the
    * dominant source of images, and the Content-Length header is quite reliable.
    * Thus, pre-allocation simplifies code and reduces the total number of
    * allocations.
    */
-  virtual nsresult SetSourceSizeHint(PRUint32 sizeHint);
+  nsresult SetSourceSizeHint(PRUint32 sizeHint);
 
   // "Blend" method indicates how the current image is combined with the
   // previous image.
   enum {
     // All color components of the frame, including alpha, overwrite the current
     // contents of the frame's output buffer region
     kBlendSource =  0,