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

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_memory.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_PLUGIN_PPB_MEMORY_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_PPB_MEMORY_H_
 
 #include "native_client/src/include/nacl_macros.h"
-
-struct PPB_Memory_Dev;
+#include "ppapi/c/dev/ppb_memory_dev.h"
 
 namespace ppapi_proxy {
 
 // Implements the plugin side of the PPB_Memory_Dev interface.
 class PluginMemory {
  public:
   // Returns an interface pointer suitable to the PPAPI client.
   static const PPB_Memory_Dev* GetInterface();
 
  private:
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginMemory);
 };
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_PPB_MEMORY_H_
-