Add a way to implement GetInterface in the broker.

ppapi/cpp/module_embedder.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_CPP_MODULE_EMBEDDER_H_
 #define PPAPI_CPP_MODULE_EMBEDDER_H_
 
+#include "ppapi/c/ppp.h"
+
 /// @file
 /// This file defines the APIs for creating a Module object.
 namespace pp {
 
 class Module;
 
 /// This function creates the <code>pp::Module</code> object associated with
 /// this module.
 ///
 /// <strong>Note: </strong>NaCl module developers must implement this function.
 ///
 /// @return Returns the module if it was successfully created, or NULL on
 /// failure. Upon failure, the module will be unloaded.
 pp::Module* CreateModule();
 
+/// Sets the get interface function in the broker process.
+///
+/// This function is only relevant when you're using the PPB_Broker interface
+/// in a trusted native plugin. In this case, you may need to implement
+/// PPP_GetInterface when the plugin is loaded in the unsandboxed process.
+/// Normally the C++ wrappers implement PPP_GetInterface for you but this
+/// doesn't work in the context of the broker process.
+//
+/// So if you need to implement PPP_* interfaces in the broker process, call
+/// this function in your PPP_InitializeBroker implementation which will set
+/// up the given function as implementing PPP_GetInterface.
+void SetBrokerGetInterfaceFunc(PP_GetInterface_Func broker_get_interface);
+
 }  // namespace pp
 
 #endif  // PPAPI_CPP_MODULE_EMBEDDER_H_