Convert NaCl renderer-browser messages to mojo.

components/nacl/browser/pnacl_host.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/browser/pnacl_host.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 377 matching lines @@
     pt->callback.Run(base::File(), false);
   }
 }
 
 //////////////////// GetNexeFd miss path
 // Return the temp fd to the renderer, reporting a miss.
 void PnaclHost::ReturnMiss(const PendingTranslationMap::iterator& entry) {
   // Return the fd
   PendingTranslation* pt = &entry->second;
   NexeFdCallback cb(pt->callback);
-  cb.Run(*pt->nexe_fd, false);
+  cb.Run(pt->nexe_fd->Duplicate(), false);
   if (!pt->nexe_fd->IsValid()) {
     // Bad FD is unrecoverable, so clear out the entry.
     pending_translations_.erase(entry);
   }
 }
 
 // On error, just return a null refptr.
 // static
 scoped_refptr<net::DrainableIOBuffer> PnaclHost::CopyFileToBuffer(
     std::unique_ptr<base::File> file) {
@@ skipping 148 matching lines @@
   }
   if (file_error == -1) {
     // Write error on the temp file. Request a new file and start over.
     BrowserThread::PostBlockingPoolTask(
         FROM_HERE,
         base::Bind(CloseScopedFile, Passed(&file)));
     CreateTemporaryFile(base::Bind(&PnaclHost::OnTempFileReturn,
                                    base::Unretained(this), entry->first));
     return;
   }
-  entry->second.callback.Run(*file.get(), true);
+  entry->second.callback.Run(file->Duplicate(), true);
   BrowserThread::PostBlockingPoolTask(
       FROM_HERE,
       base::Bind(CloseScopedFile, Passed(&file)));
   pending_translations_.erase(entry);
 }
 
 ///////////////////
 
 void PnaclHost::RendererClosing(int render_process_id) {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ skipping 81 matching lines @@
   DCHECK(pending_backend_operations_ >= 0);
   if (pending_translations_.empty() &&
       pending_backend_operations_ <= 0 &&
       cache_state_ == CacheReady) {
     cache_state_ = CacheUninitialized;
     disk_cache_.reset();
   }
 }
 
 }  // namespace pnacl