Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_
 
 #include <stdarg.h>
 
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/include/portability.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
 #include "native_client/src/shared/platform/nacl_check.h"
 #include "native_client/src/shared/platform/nacl_threads.h"
 #include "native_client/src/trusted/desc/nacl_desc_invalid.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/ppp.h"
+#include "ppapi/c/ppp_input_event.h"
 #include "ppapi/c/ppp_instance.h"
 #include "ppapi/c/ppp_messaging.h"
 
 namespace plugin {
 class Plugin;
 }
 
-struct PPP_InputEvent;
-
 namespace ppapi_proxy {
 
 class BrowserPpp {
  public:
   BrowserPpp(NaClSrpcChannel* main_channel, plugin::Plugin* plugin)
       : main_channel_(main_channel),
         is_nexe_alive_(true),
         plugin_pid_(0),
         plugin_(plugin),
         ppp_instance_interface_(NULL),
@@ skipping 57 matching lines @@
   const PPP_InputEvent* ppp_input_event_interface_;
 
   // The thread used to handle calls on other than the main thread.
   struct NaClThread upcall_thread_;
   NACL_DISALLOW_COPY_AND_ASSIGN(BrowserPpp);
 };
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_BROWSER_PPP_H_