Remove DemuxerFactory and URL parameter from Pipeline.

media/base/preload.h

-// Copyright (c) 2011 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.
-
-#ifndef MEDIA_BASE_PRELOAD_H_
-#define MEDIA_BASE_PRELOAD_H_
-
-namespace media {
-
-// Used to specify video preload states. They are "hints" to the browser about
-// how aggressively the browser should load and buffer data.
-// Please see the HTML5 spec for the descriptions of these values:
-// http://www.w3.org/TR/html5/video.html#attr-media-preload
-//
-// Enum values must match the values in WebCore::MediaPlayer::Preload and
-// there will be assertions at compile time if they do not match.
-enum Preload {
-  NONE,
-  METADATA,
-  AUTO,
-};
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_PRELOAD_H_