Pass around IPC::ChannelHandles instead of raw fds in the NaCl IRT.

ppapi/nacl_irt/irt_ppapi.cc

 // 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 "build/build_config.h"
 // Need to include this before most other files because it defines
 // IPC_MESSAGE_LOG_ENABLED. We need to use it to define
 // IPC_MESSAGE_MACROS_LOG_ENABLED so ppapi_messages.h will generate the
 // ViewMsgLog et al. functions.
 
@@ skipping 20 matching lines @@
 
 int irt_ppapi_start(const struct PP_StartFunctions* funcs) {
   g_pp_functions = *funcs;
 
   base::MessageLoop loop;
   ppapi::proxy::PluginGlobals plugin_globals(
       scoped_refptr<base::TaskRunner>(ppapi::GetIOThread()->task_runner()));
 
   ppapi::PpapiDispatcher ppapi_dispatcher(
       ppapi::GetIOThread()->task_runner(), ppapi::GetShutdownEvent(),
-      ppapi::GetBrowserIPCFileDescriptor(),
-      ppapi::GetRendererIPCFileDescriptor());
+      ppapi::GetBrowserIPCChannelHandle(),
+      ppapi::GetRendererIPCChannelHandle());
   plugin_globals.SetPluginProxyDelegate(&ppapi_dispatcher);
 
   loop.Run();
 
   return 0;
 }
 
 int32_t PPP_InitializeModule(PP_Module module_id,
                              PPB_GetInterface get_browser_interface) {
   return g_pp_functions.PPP_InitializeModule(module_id, get_browser_interface);
 }
 
 void PPP_ShutdownModule(void) {
   g_pp_functions.PPP_ShutdownModule();
 }
 
 const void* PPP_GetInterface(const char* interface_name) {
   return g_pp_functions.PPP_GetInterface(interface_name);
 }
 
 const struct nacl_irt_ppapihook nacl_irt_ppapihook = {
   irt_ppapi_start,
   PpapiPluginRegisterThreadCreator,
 };