Move VideoRenderer out of Filter heirarchy.

media/base/filter_host.h

-// 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.
-
-// FilterHost describes an interface for individual filters to access and
-// modify global playback information.  Every filter is given a filter host
-// reference as part of initialization.
-//
-// This interface is intentionally verbose to cover the needs for the different
-// types of filters (see media/base/filters.h for filter definitions).  Filters
-// typically use parts of the interface that are relevant to their function.
-// For example, an audio renderer filter typically calls SetTime as it feeds
-// data to the audio hardware.  A video renderer filter typically calls GetTime
-// to synchronize video with audio.  An audio and video decoder would typically
-// have no need to call either SetTime or GetTime.
-
-#ifndef MEDIA_BASE_FILTER_HOST_H_
-#define MEDIA_BASE_FILTER_HOST_H_
-
-#include "base/time.h"
-#include "media/base/media_export.h"
-#include "media/base/pipeline_status.h"
-#include "ui/gfx/size.h"
-
-namespace media {
-
-class MEDIA_EXPORT FilterHost {
- public:
-  // Stops execution of the pipeline due to a fatal error.  Do not call this
-  // method with PIPELINE_OK.
-  virtual void SetError(PipelineStatus error) = 0;
-
-  // Gets the current time.
-  virtual base::TimeDelta GetTime() const = 0;
-
-  // Gets the duration.
-  virtual base::TimeDelta GetDuration() const = 0;
-
-  // Sets the natural size of the video output in pixel units.
-  virtual void SetNaturalVideoSize(const gfx::Size& size) = 0;
-
-  // Notifies that this filter has ended, typically only called by filter graph
-  // endpoints such as renderers.
-  virtual void NotifyEnded() = 0;
-
- protected:
-  virtual ~FilterHost() {}
-};
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_FILTER_HOST_H_