ChildProcessSecurityPolicy: Port FileAPIMessageFilter to use new checks

content/browser/fileapi/browser_file_system_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 "content/browser/fileapi/browser_file_system_helper.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 80 matching lines @@
 
 bool FileSystemURLIsValid(
     fileapi::FileSystemContext* context,
     const fileapi::FileSystemURL& url) {
   if (!url.is_valid())
     return false;
 
   return context->GetFileSystemBackend(url.type()) != NULL;
 }
 
-bool CheckFileSystemPermissionsForProcess(
-    fileapi::FileSystemContext* context, int process_id,
-    const fileapi::FileSystemURL& url, int permissions,
-    base::PlatformFileError* error) {
-  DCHECK(error);
-
-  if (!FileSystemURLIsValid(context, url)) {
-    *error = base::PLATFORM_FILE_ERROR_INVALID_URL;
-    return false;
-  }
-
-  if (!ChildProcessSecurityPolicyImpl::GetInstance()->
-          HasPermissionsForFileSystemFile(process_id, url, permissions)) {
-    *error = base::PLATFORM_FILE_ERROR_SECURITY;
-    return false;
-  }
-
-  *error = base::PLATFORM_FILE_OK;
-  return true;
-}
-
 void SyncGetPlatformPath(fileapi::FileSystemContext* context,
                          int process_id,
                          const GURL& path,
                          base::FilePath* platform_path) {
   DCHECK(context->default_file_task_runner()->
          RunsTasksOnCurrentThread());
   DCHECK(platform_path);
   *platform_path = base::FilePath();
   fileapi::FileSystemURL url(context->CrackURL(path));
   if (!FileSystemURLIsValid(context, url))
@@ skipping 10 matching lines @@
   context->operation_runner()->SyncGetPlatformPath(url, platform_path);
 
   // The path is to be attached to URLLoader so we grant read permission
   // for the file. (We need to check first because a parent directory may
   // already have the permissions and we don't need to grant it to the file.)
   if (!policy->CanReadFile(process_id, *platform_path))
     policy->GrantReadFile(process_id, *platform_path);
 }
 
 }  // namespace content