Fixes to get UNIX working

shell/public/nsIApplicationShell.h

@@ -22,6 +22,10 @@
 #include "nsshell.h"
 #include "nscore.h"
 
+#include "nsIShellInstance.h"
+
+class nsIShellInstance;
+
 #define NS_IAPPLICATIONSHELL_IID      \
  { 0xaf9a93e0, 0xdebc, 0x11d1, \
    {0x92, 0x44, 0x00, 0x80, 0x5f, 0x8a, 0x7a, 0xb6} }
@@ -40,6 +44,7 @@ class nsIApplicationShell : public nsISupports {
 public:
   // Create a native window for this web widget; may be called once
   NS_IMETHOD Init() = 0;
+  NS_IMETHOD Init(nsIShellInstance * aShellInstance) = 0;
 
   NS_IMETHOD Run() = 0;