Revert of Remove IPC::BrokerableAttachment.

ppapi/proxy/nacl_message_scanner.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 "ppapi/proxy/nacl_message_scanner.h"
 
 #include <stddef.h>
 
 #include <tuple>
 #include <utility>
@@ skipping 45 matching lines @@
 
 void WriteHandle(int handle_index,
                  const SerializedHandle& handle,
                  base::Pickle* msg) {
   SerializedHandle::WriteHeader(handle.header(), msg);
 
   if (handle.type() != SerializedHandle::INVALID) {
     // Now write the handle itself in POSIX style.
     // See ParamTraits<FileDescriptor>::Read for where these values are read.
     msg->WriteBool(true);  // valid == true
+    msg->WriteBool(false);  // brokerable == false
     msg->WriteInt(handle_index);
   }
 }
 
 // Define overloads for each kind of message parameter that requires special
 // handling. See ScanTuple for how these get used.
 
 // Overload to match SerializedHandle.
 void ScanParam(const SerializedHandle& handle, ScanningResults* results) {
   results->handles.push_back(handle);
@@ skipping 482 matching lines @@
             fio_it->second->SetMaxWrittenOffset(offset_it->second);
         }
       }
       break;
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi