fileapi: Add modification time check for FileSystemFileStreamReader

webkit/fileapi/file_system_file_stream_reader.cc

Index: webkit/fileapi/file_system_file_stream_reader.cc
diff --git a/webkit/fileapi/file_system_file_stream_reader.cc b/webkit/fileapi/file_system_file_stream_reader.cc
index 02416628d1130313dc3bca8547717037ac677f59..ff61abc87cce4788a8d1223e184ce90d019642fe 100644
--- a/webkit/fileapi/file_system_file_stream_reader.cc
+++ b/webkit/fileapi/file_system_file_stream_reader.cc
@@ -50,10 +50,12 @@ void Int64CallbackAdapter(const net::Int64CompletionCallback& callback,
 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)) {
 }
@@ -122,7 +124,7 @@ void FileSystemFileStreamReader::DidCreateSnapshot(
   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();
 }