Reapplies all the IPC system work (reverts the revert r56272).

chrome/common/nacl_messages_internal.h

 // Copyright (c) 2009 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.
 
+#include "base/process.h"
 #include "chrome/common/nacl_types.h"
 #include "ipc/ipc_message_macros.h"
 
 //-----------------------------------------------------------------------------
 // NaClProcess messages
 // These are messages sent from the browser to the NaCl process.
 IPC_BEGIN_MESSAGES(NaClProcess)
   // Tells the NaCl process to start.
   IPC_MESSAGE_CONTROL1(NaClProcessMsg_Start,
                        std::vector<nacl::FileDescriptor> /* sockets */)
 
   // Tells the NaCl broker to launch a NaCl loader process.
   IPC_MESSAGE_CONTROL1(NaClProcessMsg_LaunchLoaderThroughBroker,
                        std::wstring /* channel ID for the loader */)
 
   // Notify the browser process that the loader was launched successfully.
   IPC_MESSAGE_CONTROL2(NaClProcessMsg_LoaderLaunched,
                        std::wstring,  /* channel ID for the loader */
                        base::ProcessHandle /* loader process handle */)
 
   // Notify the broker that all loader processes have been terminated and it
   // should shutdown.
   IPC_MESSAGE_CONTROL0(NaClProcessMsg_StopBroker)
 IPC_END_MESSAGES(NaClProcess)