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

ppapi/native_client/src/shared/ppapi_proxy/command_buffer_nacl.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_COMMAND_BUFFER_NACL_H
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_COMMAND_BUFFER_NACL_H
 
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "ppapi/c/pp_graphics_3d.h"
 #include "ppapi/c/pp_resource.h"
+#include "ppapi/c/ppb_core.h"
 #include "ppapi/c/trusted/ppb_graphics_3d_trusted.h"
 
-struct PPB_Core;
-
 // A CommandBuffer proxy implementation that uses trusted PPAPI interface to
 // access a CommandBuffer.
 
 class CommandBufferNacl : public gpu::CommandBuffer {
  public:
   // This class will addref the graphics 3d resource using the core interface.
   CommandBufferNacl(PP_Resource graphics_3d, const PPB_Core* iface_core);
   virtual ~CommandBufferNacl();
 
   // CommandBuffer implementation.
@@ skipping 22 matching lines @@
   const PPB_Core* iface_core_;
   gpu::Buffer buffer_;
   State last_state_;
 
   static gpu::CommandBuffer::State PpapiToGpuState(PP_Graphics3DTrustedState s);
   static gpu::CommandBuffer::State ErrorGpuState();
   static gpu::Buffer BufferFromShm(int shm_handle, uint32_t shm_size);
 };
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_COMMAND_BUFFER_NACL_H