remove #define error macro and #included the netCore.h file which has the error macros in it.

netwerk/base/public/nsIProtocolConnection.h

@@ -20,6 +20,7 @@
 #define nsIProtocolConnection_h___
 
 #include "nsICancelable.h"
+#include "netCore.h"
 
 class nsIUrl;
 class nsIInputStream;
@@ -52,7 +53,5 @@ public:
 
 };
 
-#define NS_ERROR_NOT_CONNECTED  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_NETWORK, 3)
-
 #endif /* nsIIProtocolConnection_h___ */