Make PlatformFileForTransit its own class on Windows.

components/nacl/renderer/ppb_nacl_private_impl.cc

 // Copyright 2013 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 "components/nacl/renderer/ppb_nacl_private.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 443 matching lines @@
       }
     }
   }
 
   IPC::PlatformFileForTransit nexe_for_transit =
       IPC::InvalidPlatformFileForTransit();
 #if defined(OS_POSIX)
   if (nexe_file_info->handle != PP_kInvalidFileHandle)
     nexe_for_transit = base::FileDescriptor(nexe_file_info->handle, true);
 #elif defined(OS_WIN)
-  nexe_for_transit = IPC::PlatformFileForTransit(nexe_file_info->handle,
-                                                 base::GetCurrentProcId());
+  nexe_for_transit = IPC::PlatformFileForTransit(nexe_file_info->handle);
 #else
 # error Unsupported target platform.
 #endif
 
   std::string error_message_string;
   NaClLaunchResult launch_result;
   if (!sender->Send(new NaClHostMsg_LaunchNaCl(
           NaClLaunchParams(
               instance_info.url.spec(),
               nexe_for_transit,
@@ skipping 1268 matching lines @@
   // Mark the request as requesting a PNaCl bitcode file,
   // so that component updater can detect this user action.
   url_request.AddHTTPHeaderField(
       blink::WebString::FromUTF8("Accept"),
       blink::WebString::FromUTF8("application/x-pnacl, */*"));
   url_request.SetRequestContext(blink::WebURLRequest::kRequestContextObject);
   downloader->Load(url_request);
 }
 
 }  // namespace nacl