Cache Nacl Plugin private interface instead of calling GetnaclInterface on every process launch

ppapi/native_client/src/trusted/plugin/plugin.h

 // -*- c++ -*-
 // Copyright (c) 2012 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.
 
 // The portable representation of an instance and root scriptable object.
 // The PPAPI version of the plugin instantiates a subclass of this class.
 
 #ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_
 #define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_
 
 #include <stdio.h>
 
 #include <map>
 #include <queue>
 #include <set>
 #include <string>
 
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/include/nacl_scoped_ptr.h"
 #include "native_client/src/include/nacl_string.h"
 #include "native_client/src/trusted/plugin/file_downloader.h"
 #include "native_client/src/trusted/plugin/nacl_subprocess.h"
 #include "native_client/src/trusted/plugin/pnacl_coordinator.h"
 #include "native_client/src/trusted/plugin/service_runtime.h"
 #include "native_client/src/trusted/plugin/utility.h"
 
+#include "ppapi/c/private/ppb_nacl_private.h"
 #include "ppapi/cpp/private/var_private.h"
 // for pp::VarPrivate
 #include "ppapi/cpp/private/instance_private.h"
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/url_loader.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/cpp/view.h"
 
 struct NaClSrpcChannel;
 
@@ skipping 475 matching lines @@
 
   // Finds the file downloader which owns the given URL loader. This is used
   // in UpdateDownloadProgress to map a url loader back to the URL being
   // downloaded.
   const FileDownloader* FindFileDownloader(PP_Resource url_loader) const;
 
   int64_t time_of_last_progress_event_;
 
   // Whether we are using IPC-based PPAPI proxy.
   bool using_ipc_proxy_;
+
+  const PPB_NaCl_Private* nacl_interface_;
 };
 
 }  // namespace plugin
 
 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PLUGIN_H_