ChildProcessSecurityPolicy: Add DeleteFromFileSystem permission.

chrome/browser/devtools/devtools_file_helper.cc

 // Copyright (c) 2012 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/devtools/devtools_file_helper.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 134 matching lines @@
   std::string file_system_id = isolated_context()->RegisterFileSystemForPath(
       fileapi::kFileSystemTypeNativeLocal, path, registered_name);
 
   content::ChildProcessSecurityPolicy* policy =
       content::ChildProcessSecurityPolicy::GetInstance();
   RenderViewHost* render_view_host = web_contents->GetRenderViewHost();
   int renderer_id = render_view_host->GetProcess()->GetID();
   policy->GrantReadFileSystem(renderer_id, file_system_id);
   policy->GrantWriteFileSystem(renderer_id, file_system_id);
   policy->GrantCreateFileForFileSystem(renderer_id, file_system_id);
+  policy->GrantDeleteFromFileSystem(renderer_id, file_system_id);
 
   // We only need file level access for reading FileEntries. Saving FileEntries
   // just needs the file system to have read/write access, which is granted
   // above if required.
   if (!policy->CanReadFile(renderer_id, path))
     policy->GrantReadFile(renderer_id, path);
 
   return file_system_id;
 }
 
@@ skipping 226 matching lines @@
   DictionaryValue* file_systems_paths_value = update.Get();
   file_systems_paths_value->RemoveWithoutPathExpansion(file_system_path, NULL);
 }
 
 bool DevToolsFileHelper::IsFileSystemAdded(
     const std::string& file_system_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   set<std::string> file_system_paths = GetAddedFileSystemPaths(profile_);
   return file_system_paths.find(file_system_path) != file_system_paths.end();
 }