Turn on file access checks on Win.

chrome/browser/extensions/sandboxed_extension_unpacker.cc

 // Copyright (c) 2010 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/extensions/sandboxed_extension_unpacker.h"
 
 #include <set>
 
 #include "base/base64.h"
 #include "base/crypto/signature_verifier.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/scoped_handle.h"
 #include "base/task.h"
+#include "base/thread_restrictions.h"
 #include "base/utf_string_conversions.h"  // TODO(viettrungluu): delete me.
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_l10n_util.h"
 #include "chrome/common/extensions/extension_unpacker.h"
@@ skipping 84 matching lines @@
     ExtensionUnpacker unpacker(temp_crx_path);
     if (unpacker.Run() && unpacker.DumpImagesToFile() &&
         unpacker.DumpMessageCatalogsToFile()) {
       OnUnpackExtensionSucceeded(*unpacker.parsed_manifest());
     } else {
       OnUnpackExtensionFailed(unpacker.error_message());
     }
   }
 }
 
-SandboxedExtensionUnpacker::~SandboxedExtensionUnpacker() {}
+SandboxedExtensionUnpacker::~SandboxedExtensionUnpacker() {
+  // temp_dir_'s destructor will delete a directory on the file thread.  Do
+  // this on another thread to avoid slowing the UI thread.
+  // http://crbug.com/61922
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+  temp_dir_.Delete();
+}
 
 void SandboxedExtensionUnpacker::StartProcessOnIOThread(
     const FilePath& temp_crx_path) {
   UtilityProcessHost* host = new UtilityProcessHost(
       rdh_, this, thread_identifier_);
   host->StartExtensionUnpacker(temp_crx_path);
 }
 
 void SandboxedExtensionUnpacker::OnUnpackExtensionSucceeded(
     const DictionaryValue& manifest) {
@@ skipping 274 matching lines @@
     if (!file_util::WriteFile(path,
                               catalog_json.c_str(),
                               catalog_json.size())) {
       ReportFailure("Error saving catalog.");
       return false;
     }
   }
 
   return true;
 }