PPAPI: Make PPP_MessageHandler work in PNaCl

ppapi/c/ppp_message_handler.h

 /* Copyright 2014 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.
  */
 
-/* From ppp_message_handler.idl modified Tue Jun  3 16:50:26 2014. */
+/* From ppp_message_handler.idl modified Wed Sep 10 17:04:21 2014. */
 
 #ifndef PPAPI_C_PPP_MESSAGE_HANDLER_H_
 #define PPAPI_C_PPP_MESSAGE_HANDLER_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
@@ skipping 12 matching lines @@
  */
 /**
  * The <code>PPP_MessageHandler</code> interface is implemented by the plugin
  * if the plugin wants to receive messages from a thread other than the main
  * Pepper thread, or if the plugin wants to handle blocking messages which
  * JavaScript may send via postMessageAndAwaitResponse().
  *
  * This interface struct should not be returned by PPP_GetInterface; instead it
  * must be passed as a parameter to PPB_Messaging::RegisterMessageHandler.
  */
-struct PPP_MessageHandler_0_1 {
+struct PPP_MessageHandler_0_2 { /* dev */
   /**
    * Invoked as a result of JavaScript invoking postMessage() on the plugin's
    * DOM element.
    *
    * @param[in] instance A <code>PP_Instance</code> identifying one instance
    * of a module.
    * @param[in] user_data is the same pointer which was provided by a call to
    * RegisterMessageHandler.
    * @param[in] message A copy of the parameter that JavaScript provided to
    * postMessage().
    */
   void (*HandleMessage)(PP_Instance instance,
                         void* user_data,
-                        struct PP_Var message);
+                        const struct PP_Var* message);
   /**
    * Invoked as a result of JavaScript invoking postMessageAndAwaitResponse()
    * on the plugin's DOM element.
    *
    * @param[in] instance A <code>PP_Instance</code> identifying one instance
    * of a module.
    * @param[in] user_data is the same pointer which was provided by a call to
    * RegisterMessageHandler.
    * @param[in] message is a copy of the parameter that JavaScript provided
    * to postMessageAndAwaitResponse.
-   * @return will be copied to a JavaScript object which is returned as
-   * the result of postMessageAndAwaitResponse to the invoking JavaScript.
+   * @param[out] response will be copied to a JavaScript object which is
+   * returned as the result of postMessageAndAwaitResponse to the invoking
+   *
    */
-  struct PP_Var (*HandleBlockingMessage)(PP_Instance instance,
-                                         void* user_data,
-                                         struct PP_Var message);
+  void (*HandleBlockingMessage)(PP_Instance instance,
+                                void* user_data,
+                                const struct PP_Var* message,
+                                struct PP_Var* response);
   /**
    * Invoked when the handler object is no longer needed. After this, no more
    * calls will be made which pass this same value for <code>instance</code>
    * and <code>user_data</code>.
    *
    * @param[in] instance A <code>PP_Instance</code> identifying one instance
    * of a module.
    * @param[in] user_data is the same pointer which was provided by a call to
    * RegisterMessageHandler.
    */
   void (*Destroy)(PP_Instance instance, void* user_data);
 };
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPP_MESSAGE_HANDLER_H_ */