fileapi: Add modification time check for FileSystemFileStreamReader

webkit/fileapi/file_system_file_stream_reader.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_file_stream_reader.h"
 
 #include "base/file_util_proxy.h"
 #include "base/platform_file.h"
 #include "base/single_thread_task_runner.h"
 #include "net/base/file_stream.h"
@@ skipping 32 matching lines @@
 void Int64CallbackAdapter(const net::Int64CompletionCallback& callback,
                           int value) {
   callback.Run(value);
 }
 
 }  // namespace
 
 FileSystemFileStreamReader::FileSystemFileStreamReader(
     FileSystemContext* file_system_context,
     const FileSystemURL& url,
-    int64 initial_offset)
+    int64 initial_offset,
+    const base::Time& expected_modification_time)
     : file_system_context_(file_system_context),
       url_(url),
       initial_offset_(initial_offset),
+      expected_modification_time_(expected_modification_time),
       has_pending_create_snapshot_(false),
       weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
 }
 
 FileSystemFileStreamReader::~FileSystemFileStreamReader() {
 }
 
 int FileSystemFileStreamReader::Read(
     net::IOBuffer* buf, int buf_len,
     const net::CompletionCallback& callback) {
@@ skipping 48 matching lines @@
     error_callback.Run(net::PlatformFileErrorToNetError(file_error));
     return;
   }
 
   // Keep the reference (if it's non-null) so that the file won't go away.
   snapshot_ref_ = file_ref;
 
   local_file_reader_.reset(
       new LocalFileStreamReader(
           file_system_context_->task_runners()->file_task_runner(),
-          platform_path, initial_offset_, base::Time()));
+          platform_path, initial_offset_, expected_modification_time_));
 
   callback.Run();
 }
 
 }  // namespace fileapi