Fixing remaining VC++ 2015 64-bit build breaks

content/common/pepper_file_util.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 "content/common/pepper_file_util.h"
+#include "ppapi/shared_impl/platform_file.h"
 
 namespace content {
 
 storage::FileSystemType PepperFileSystemTypeToFileSystemType(
     PP_FileSystemType type) {
   switch (type) {
     case PP_FILESYSTEMTYPE_LOCALTEMPORARY:
       return storage::kFileSystemTypeTemporary;
     case PP_FILESYSTEMTYPE_LOCALPERSISTENT:
       return storage::kFileSystemTypePersistent;
     case PP_FILESYSTEMTYPE_EXTERNAL:
       return storage::kFileSystemTypeExternal;
     default:
       return storage::kFileSystemTypeUnknown;
   }
 }
 
 int IntegerFromSyncSocketHandle(
     const base::SyncSocket::Handle& socket_handle) {
-#if defined(OS_WIN)
-  return reinterpret_cast<int>(socket_handle);
-#elif defined(OS_POSIX)
-  return socket_handle;
-#else
-#error Platform not supported.
-#endif
+  return ppapi::PlatformFileToInt(socket_handle);
 }
 
 }  // namespace content