Bug 924248 - Make nsIDocument.h go on a diet; r=jst

The nsMacShellService code is rewritten to stop using GetLoadContext
which will now only be available in libxul.

dom/plugins/base/nsNPAPIPluginInstance.cpp

@@ -38,6 +38,7 @@
 #include "nsVersionComparator.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/unused.h"
+#include "nsILoadContext.h"
 
 using namespace mozilla;