Add a way to implement GetInterface in the broker.

ppapi/api/ppp.idl

Index: ppapi/api/ppp.idl
diff --git a/ppapi/api/ppp.idl b/ppapi/api/ppp.idl
index b26e63f73515a2678a30c03df5f97c740760c08c..63f2c623341f335ae4070092e8bdf11d27d6a49a 100644
--- a/ppapi/api/ppp.idl
+++ b/ppapi/api/ppp.idl
@@ -121,3 +121,18 @@ PP_EXPORT const void* PPP_GetInterface(const char* interface_name);
 
 #endinl
 
+/**
+ * Defines the type of the <code>PPP_InitializeModule</code> function.
+ */
+typedef int32_t PP_InitializeModule_Func([in] PP_Module module,
+                                         [in] PPB_GetInterface get_interface);
+
+/**
+ * Defines the type of the <code>PPP_ShutdownModule</code> function.
+ */
+typedef interface_t PP_GetInterface_Func([in] str_t interface_name);
+
+/**
+ * Defines the type of the <code>PPP_ShutdownModule</code> function.
+ */
+typedef void PP_ShutdownModule_Func();