Fix media timeline so that thumb never exceeds buffered data

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
@@ skipping 18 matching lines @@
   // 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;
 
-  // Updates the current time.  Other filters should poll to examine the updated
-  // time.
-  virtual void SetTime(base::TimeDelta time) = 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;
 
   // Disable audio renderer by calling OnAudioRendererDisabled() on all
   // filters.
   virtual void DisableAudioRenderer() = 0;
 
  protected:
   virtual ~FilterHost() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTER_HOST_H_