fileapi: Add modification time check for FileSystemFileStreamReader

webkit/fileapi/file_system_context.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 "webkit/fileapi/file_system_context.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/stl_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 241 matching lines @@
   FileSystemOperation* operation =
       mount_point_provider->CreateFileSystemOperation(url, this, &fs_error);
 
   if (error_code)
     *error_code = fs_error;
   return operation;
 }
 
 webkit_blob::FileStreamReader* FileSystemContext::CreateFileStreamReader(
     const FileSystemURL& url,
-    int64 offset) {
+    int64 offset,
+    const base::Time& expected_modification_time) {
   if (!url.is_valid())
     return NULL;
   FileSystemMountPointProvider* mount_point_provider =
       GetMountPointProvider(url.type());
   if (!mount_point_provider)
     return NULL;
-  return mount_point_provider->CreateFileStreamReader(url, offset, this);
+  return mount_point_provider->CreateFileStreamReader(
+      url, offset, expected_modification_time, this);
 }
 
 void FileSystemContext::RegisterMountPointProvider(
     FileSystemType type,
     FileSystemMountPointProvider* provider) {
   DCHECK(provider);
   DCHECK(provider_map_.find(type) == provider_map_.end());
   provider_map_[type] = provider;
 }
 
@@ skipping 21 matching lines @@
   if (!task_runners_->io_task_runner()->RunsTasksOnCurrentThread() &&
       task_runners_->io_task_runner()->DeleteSoon(FROM_HERE, this)) {
     return;
   }
   STLDeleteContainerPairSecondPointers(provider_map_.begin(),
                                        provider_map_.end());
   delete this;
 }
 
 }  // namespace fileapi