Fix PP_FileOpenFlags_Dev handling:

chrome/browser/extensions/extension_file_browser_private_api.cc

 // Copyright (c) 2011 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/extension_file_browser_private_api.h"
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 45 matching lines @@
 
 const int kReadOnlyFilePermissions = base::PLATFORM_FILE_OPEN |
                                      base::PLATFORM_FILE_READ |
                                      base::PLATFORM_FILE_EXCLUSIVE_READ |
                                      base::PLATFORM_FILE_ASYNC;
 
 const int kReadWriteFilePermissions = base::PLATFORM_FILE_OPEN |
                                       base::PLATFORM_FILE_CREATE |
                                       base::PLATFORM_FILE_OPEN_ALWAYS |
                                       base::PLATFORM_FILE_CREATE_ALWAYS |
+                                      base::PLATFORM_FILE_OPEN_TRUNCATED |
                                       base::PLATFORM_FILE_READ |
                                       base::PLATFORM_FILE_WRITE |
                                       base::PLATFORM_FILE_EXCLUSIVE_READ |
                                       base::PLATFORM_FILE_EXCLUSIVE_WRITE |
                                       base::PLATFORM_FILE_ASYNC |
-                                      base::PLATFORM_FILE_TRUNCATE |
                                       base::PLATFORM_FILE_WRITE_ATTRIBUTES;
 
 typedef std::pair<int, const FileBrowserHandler* > LastUsedHandler;
 typedef std::vector<LastUsedHandler> LastUsedHandlerList;
 
 typedef std::vector<const FileBrowserHandler*> ActionList;
 
 
 // Breaks down task_id that is used between getFileTasks() and executeTask() on
 // its building blocks. task_id field the following structure:
@@ skipping 1000 matching lines @@
 #undef SET_STRING
 
   // TODO(serya): Create a new string in .grd file for this one in M13.
   dict->SetString("PREVIEW_IMAGE",
       l10n_util::GetStringUTF16(IDS_CERT_MANAGER_VIEW_CERT_BUTTON));
   dict->SetString("PLAY_MEDIA",
       l10n_util::GetStringUTF16(IDS_CONTENT_CONTEXT_PLAY));
 
   return true;
 }