Remove untrusted scripting support.

ppapi/shared_impl/ppp_instance_combined.h

Index: ppapi/shared_impl/ppp_instance_combined.h
diff --git a/ppapi/shared_impl/ppp_instance_combined.h b/ppapi/shared_impl/ppp_instance_combined.h
index a186c062215f90525481125562df555acf3909cb..33548d569e1849f8197b59670a1ea85233183e29 100644
--- a/ppapi/shared_impl/ppp_instance_combined.h
+++ b/ppapi/shared_impl/ppp_instance_combined.h
@@ -13,9 +13,6 @@ namespace ppapi {
 struct PPP_Instance_Combined : public PPP_Instance_0_5 {
  public:
   explicit PPP_Instance_Combined(const PPP_Instance_0_5& instance_if);
-  explicit PPP_Instance_Combined(const PPP_Instance_0_4& instance_if);
-
-  PP_Var (*const GetInstanceObject_0_4)(PP_Instance instance);
 
   DISALLOW_COPY_AND_ASSIGN(PPP_Instance_Combined);
 };