Support scoped_ptr in BrowserThread::DeleteOnThread.

chrome/browser/local_discovery/pwg_raster_converter.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 "chrome/browser/local_discovery/pwg_raster_converter.h"
 
 #include "base/bind_helpers.h"
 #include "base/cancelable_callback.h"
 #include "base/file_util.h"
 #include "base/files/file.h"
@@ skipping 109 matching lines @@
   void OnSucceeded();
   void OnFailed();
 
   void RunCallback(bool success);
 
   void StartProcessOnIOThread();
 
   void RunCallbackOnUIThread(bool success);
   void OnFilesReadyOnUIThread();
 
-  scoped_ptr<FileHandlers> files_;
+  scoped_ptr<FileHandlers, BrowserThread::DeleteOnFileThread> files_;
   printing::PdfRenderSettings settings_;
   printing::PwgRasterSettings bitmap_settings_;
   PWGRasterConverter::ResultCallback callback_;
   base::WeakPtr<content::UtilityProcessHost> utility_process_host_;
 
   DISALLOW_COPY_AND_ASSIGN(PwgUtilityProcessHostClient);
 };
 
 PwgUtilityProcessHostClient::PwgUtilityProcessHostClient(
     const printing::PdfRenderSettings& settings,
     const printing::PwgRasterSettings& bitmap_settings)
     : settings_(settings), bitmap_settings_(bitmap_settings) {}
 
 PwgUtilityProcessHostClient::~PwgUtilityProcessHostClient() {
-  // Delete temp directory.
-  BrowserThread::DeleteSoon(BrowserThread::FILE, FROM_HERE, files_.release());
 }
 
 void PwgUtilityProcessHostClient::Convert(
     base::RefCountedMemory* data,
     const PWGRasterConverter::ResultCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   callback_ = callback;
   CHECK(!files_);
   files_.reset(new FileHandlers());
   BrowserThread::PostTaskAndReply(
@@ skipping 122 matching lines @@
 }
 
 }  // namespace
 
 // static
 scoped_ptr<PWGRasterConverter> PWGRasterConverter::CreateDefault() {
   return scoped_ptr<PWGRasterConverter>(new PWGRasterConverterImpl());
 }
 
 }  // namespace local_discovery