Separate DemuxerHost from DataSourceHost.

media/filters/file_data_source.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 "media/filters/file_data_source.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 
 namespace media {
 
 FileDataSource::FileDataSource()
     : force_read_errors_(false),
       force_streaming_(false) {
 }
 
 FileDataSource::FileDataSource(base::File file)
     : force_read_errors_(false),
       force_streaming_(false) {
-  if (!file_.Initialize(file.Pass()))
-    return;
-
-  UpdateHostBytes();
+  file_.Initialize(file.Pass());
 }
 
 bool FileDataSource::Initialize(const base::FilePath& file_path) {
   DCHECK(!file_.IsValid());
-
-  if (!file_.Initialize(file_path))
-    return false;
-
-  UpdateHostBytes();
-  return true;
-}
-
-void FileDataSource::set_host(DataSourceHost* host) {
-  DataSource::set_host(host);
-  UpdateHostBytes();
+  return file_.Initialize(file_path);
 }
 
 void FileDataSource::Stop(const base::Closure& callback) {
   callback.Run();
 }
 
 void FileDataSource::Read(int64 position, int size, uint8* data,
                           const DataSource::ReadCB& read_cb) {
   if (force_read_errors_ || !file_.IsValid()) {
     read_cb.Run(kReadError);
@@ skipping 20 matching lines @@
 }
 
 bool FileDataSource::IsStreaming() {
   return force_streaming_;
 }
 
 void FileDataSource::SetBitrate(int bitrate) {}
 
 FileDataSource::~FileDataSource() {}
 
-void FileDataSource::UpdateHostBytes() {
-  if (host() && file_.IsValid()) {
-    host()->SetTotalBytes(file_.length());
-    host()->AddBufferedByteRange(0, file_.length());
-  }
-}
-
 }  // namespace media