Forgot to add this method

gfx/src/gtk/nsDeviceContextGTK.cpp

@@ -566,6 +566,11 @@ NS_IMETHODIMP nsDeviceContextGTK::EndDocument(void)
   return NS_OK;
 }
 
+NS_IMETHODIMP nsDeviceContextGTK::AbortDocument(void)
+{
+  return NS_OK;
+}
+
 NS_IMETHODIMP nsDeviceContextGTK::BeginPage(void)
 {
   return NS_OK;

gfx/src/gtk/nsDeviceContextGTK.h

@@ -86,6 +86,7 @@ public:
 
   NS_IMETHOD BeginDocument(PRUnichar * aTitle);
   NS_IMETHOD EndDocument(void);
+  NS_IMETHOD AbortDocument(void);
 
   NS_IMETHOD BeginPage(void);
   NS_IMETHOD EndPage(void);