Bug 686137 - Make nsMediaDecoder::RequestFrameBufferLength virtual. r=kinetik

content/media/nsMediaDecoder.h

@@ -366,7 +366,7 @@ public:
 
   // Sets the length of the framebuffer used in MozAudioAvailable events.
   // The new size must be between 512 and 16384.
-  nsresult RequestFrameBufferLength(PRUint32 aLength);
+  virtual nsresult RequestFrameBufferLength(PRUint32 aLength);
 
   // Moves any existing channel loads into the background, so that they don't
   // block the load event. This is called when we stop delaying the load