PPAPI/NaCl: Move plugin_main.cc's contents into irt_ppapi.cc

ppapi/native_client/src/untrusted/pnacl_irt_shim/irt_shim_ppapi.c

 /*
  * Copyright 2014 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 "ppapi/native_client/src/untrusted/pnacl_irt_shim/irt_shim_ppapi.h"
 
 #include "native_client/src/untrusted/irt/irt.h"
+#include "ppapi/nacl_irt/irt_ppapi.h"
 #include "ppapi/nacl_irt/public/irt_ppapi.h"
 #include "ppapi/native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.h"
-#include "ppapi/nacl_irt/plugin_main.h"
 
 /*
  * Defines a version of the version irt_ppapi_start and of the irt_ppapihook
  * that returns a shimmed GetInterface for PNaCl.
  *
  * The hook will be linked into the IRT but it is considered unstable.
  * Stable nexes should not use that IRT hook (and a filter prevents
  * it from being used). Instead PNaCl nexes should embed the
  * irt_shim_ppapi_start and the shim functions directly into the nexe
  * for ABI stability.
@@ skipping 18 matching lines @@
  /*
   * This will be discovered and set by the shim, since we cannot link
   * against the IRT directly in the AOT library.
   */
 int (*real_irt_ppapi_start)(const struct PP_StartFunctions *) = NULL;
 #else
  /*
   * Otherwise, when linking directly into the IRT, we can refer to the
   * real irt_ppapi_start from irt_ppapi.
   */
-extern int irt_ppapi_start(const struct PP_StartFunctions *);
 static int (* const real_irt_ppapi_start)(const struct PP_StartFunctions *) =
     &irt_ppapi_start;
 #endif
 
 int irt_shim_ppapi_start(const struct PP_StartFunctions *funcs) {
   g_user_start_functions = *funcs;
   /*
    * Record the original PPP_GetInterface and provide a shimmed one
    * via wrapped_ppapi_methods.
    */
   const struct PP_StartFunctions wrapped_ppapi_methods = {
     shim_PPPInitializeModule,
     shim_PPPShutdownModule,
     __Pnacl_PPPGetInterface
   };
   __set_real_Pnacl_PPPGetInterface(g_user_start_functions.PPP_GetInterface);
   /*
    * Invoke the IRT's ppapi_start interface with the wrapped interface.
    */
   return (*real_irt_ppapi_start)(&wrapped_ppapi_methods);
 }
 
 #ifndef PNACL_SHIM_AOT
 const struct nacl_irt_ppapihook nacl_irt_ppapihook_pnacl_private = {
   irt_shim_ppapi_start,
   PpapiPluginRegisterThreadCreator,
 };
 #endif